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  • IVF for Women Over 40 in Thailand: What You Need to Know

    If you are a woman over 40 considering IVF in Thailand, you likely have many questions about your chances, the process, and what you can do to make informed decisions. This guide provides a clear overview of what to expect, focusing on the role of preimplantation genetic testing for aneuploidy (PGT-A), the general steps involved, and the questions you should ask your clinic. While IVF can be a path to parenthood, it is important to understand that success is not guaranteed, and your individual situation will influence your options.

    At a Glance: Key Points for Women Over 40

    • IVF is possible after 40, but the chance of success depends on many factors, including egg quality and quantity.
    • Chromosomal abnormalities in embryos increase with maternal age, which is why PGT-A is often discussed.
    • PGT-A can help identify embryos with the correct number of chromosomes, but it does not guarantee a successful pregnancy.
    • Your IVF protocol may be tailored to your specific needs, and you should discuss all options with your fertility specialist.
    • Thailand offers a range of fertility clinics, but you must verify credentials and services directly.

    Understanding IVF After 40

    IVF involves retrieving eggs from your ovaries, fertilizing them with sperm in a laboratory, and then transferring a resulting embryo to your uterus. For women over 40, the process is often more complex due to age-related changes in egg quality and quantity. As you age, the number of eggs you have decreases, and the proportion of eggs with chromosomal abnormalities increases. This can affect the likelihood of fertilization, embryo development, and implantation.

    It is essential to have a thorough evaluation before starting IVF. This typically includes blood tests to check hormone levels, an ultrasound to assess your ovarian reserve, and a semen analysis if you are using a partner’s sperm. Your doctor will use this information to create a personalized treatment plan.

    The Role of PGT-A for Older Women

    Preimplantation genetic testing for aneuploidy (PGT-A) is a test that can be performed on embryos created through IVF before transfer. It checks for the correct number of chromosomes (46 in total). Embryos with an abnormal number of chromosomes (aneuploid) are less likely to implant and, if they do, often result in miscarriage or genetic disorders such as Down syndrome.

    For women over 40, the risk of aneuploidy is higher compared to younger women. Therefore, PGT-A may be a valuable tool to help select embryos with the best chance of leading to a healthy pregnancy. However, PGT-A is not a guarantee of success. It does not test for all genetic conditions, and a normal result does not ensure a live birth. It also cannot improve the quality of your eggs; it only helps you choose among the embryos you have. Additionally, PGT-A requires a biopsy of the embryo, which is a delicate procedure, and not all embryos will survive the process.

    What to Expect During IVF Treatment

    IVF treatment typically follows a series of steps, though the exact timeline can vary from clinic to clinic. Here is a general overview:

    1. Ovarian stimulation: You will take fertility medications, usually injections, to stimulate your ovaries to produce multiple eggs. This phase lasts about 10-14 days, with regular monitoring via blood tests and ultrasounds.
    2. Egg retrieval: When your eggs are mature, a minor surgical procedure is performed under sedation to collect them from your ovaries. This is usually done through the vagina with an ultrasound-guided needle.
    3. Fertilization: The eggs are fertilized with sperm in the laboratory, either by conventional insemination or intracytoplasmic sperm injection (ICSI).
    4. Embryo culture: The resulting embryos are cultured in the lab for 5-6 days, until they reach the blastocyst stage.
    5. PGT-A (if performed): A few cells are removed from each embryo and sent for genetic testing. This can take several days to weeks, depending on the laboratory.
    6. Embryo transfer: A healthy embryo is selected and transferred into your uterus. This is a simple procedure that does not require anesthesia.
    7. Pregnancy test: About 10-14 days after the transfer, you will have a blood test to determine if you are pregnant.

    If you have embryos that are not transferred, they may be frozen for future use, depending on your clinic’s policies and your consent.

    Factors That Affect Success

    Several factors influence the likelihood of IVF success for women over 40:

    • Age: The most significant factor. As age increases, the chance of live birth per cycle decreases.
    • Ovarian reserve: The number of eggs you have remaining, which can be estimated by blood tests and ultrasound.
    • Embryo quality: The genetic and morphological quality of the embryos.
    • Uterine health: The condition of your uterus, including any fibroids or polyps that might affect implantation.
    • Lifestyle factors: Smoking, alcohol, and body weight can affect outcomes.

    It is important to have realistic expectations. While many women over 40 do achieve successful pregnancies with IVF, the process may require multiple cycles, and some women may not achieve a live birth. Your doctor can give you a more personalized assessment based on your specific circumstances.

    Questions to Ask Your Clinic

    When choosing a fertility clinic in Thailand, it is crucial to ask the right questions. Here are some to consider:

    • What is your experience with IVF for women over 40?
    • Do you offer PGT-A, and what is the cost?
    • What is your policy on embryo freezing and storage?
    • What are the success rates for women in my age group? (Ask for specific data, but remember that rates can be misleading.)
    • What is the total cost of treatment, including medications, lab fees, and any additional procedures?
    • What is the process for genetic counseling and consent for PGT?
    • What support services are available, such as counseling or acupuncture?

    Next Steps

    If you are considering IVF in Thailand, here is a checklist to help you move forward:

    1. Research fertility clinics and verify their credentials and accreditations.
    2. Schedule a consultation with a fertility specialist to discuss your medical history and options.
    3. Ask for a detailed cost breakdown and payment plans.
    4. Consider whether PGT-A is right for you, and discuss the risks and benefits with your doctor.
    5. Plan for your travel and stay in Thailand, including accommodation and time off work.
    6. Ensure you have all necessary medical records and referrals.

    Remember, every journey is unique. Take the time to gather information, ask questions, and make decisions that feel right for you.

    Frequently Asked Questions

    Is IVF successful for women over 40?

    IVF can be successful for some women over 40, but success rates decline with age. The chance of a live birth depends on many factors, including egg quality and quantity. It is important to have realistic expectations and discuss your individual prognosis with a fertility specialist.

    What is PGT-A and why is it recommended for older women?

    PGT-A is a genetic test that checks embryos for the correct number of chromosomes. It is often discussed for women over 40 because the risk of chromosomal abnormalities increases with age. PGT-A can help select embryos with the best chance of implantation and a healthy pregnancy, but it does not guarantee success.

    Does PGT-A improve the chance of a live birth?

    PGT-A may help reduce the risk of miscarriage and failed implantation by selecting embryos with the correct number of chromosomes, but it does not guarantee a live birth. The overall success still depends on other factors, such as embryo quality and uterine health.

    Are there alternatives to PGT-A?

    Alternatives include transferring embryos without testing, which may result in a lower chance of implantation and a higher risk of miscarriage. Some clinics also offer other genetic tests, such as PGT-M for specific genetic disorders, but these are different from PGT-A.

    What is the cost of IVF in Thailand?

    The cost of IVF in Thailand varies widely depending on the clinic, the medications used, and any additional procedures like PGT-A. It is best to request a detailed quote from your chosen clinic. Be sure to ask about all potential costs, including consultations, lab fees, and medications.

    Frequently asked questions

    Is IVF successful for women over 40?

    IVF can be successful for some women over 40, but success rates decline with age. The chance of a live birth depends on many factors, including egg quality and quantity. It is important to have realistic expectations and discuss your individual prognosis with a fertility specialist.

    What is PGT-A and why is it recommended for older women?

    PGT-A is a genetic test that checks embryos for the correct number of chromosomes. It is often discussed for women over 40 because the risk of chromosomal abnormalities increases with age. PGT-A can help select embryos with the best chance of implantation and a healthy pregnancy, but it does not guarantee success.

    Does PGT-A improve the chance of a live birth?

    PGT-A may help reduce the risk of miscarriage and failed implantation by selecting embryos with the correct number of chromosomes, but it does not guarantee a live birth. The overall success still depends on other factors, such as embryo quality and uterine health.

    Are there alternatives to PGT-A?

    Alternatives include transferring embryos without testing, which may result in a lower chance of implantation and a higher risk of miscarriage. Some clinics also offer other genetic tests, such as PGT-M for specific genetic disorders, but these are different from PGT-A.

    What is the cost of IVF in Thailand?

    The cost of IVF in Thailand varies widely depending on the clinic, the medications used, and any additional procedures like PGT-A. It is best to request a detailed quote from your chosen clinic. Be sure to ask about all potential costs, including consultations, lab fees, and medications.

    Continue your research

    Medical information notice: This article is educational and does not replace individual assessment, diagnosis, genetic counselling or treatment advice from a licensed clinician. Provider services, availability, fees and policies should be verified directly before booking.

  • PGT-A vs PGT-SR: Understanding the Difference for Chromosome and Structural Issues

    PGT-A vs PGT-SR: What’s the Difference?

    If you are exploring IVF with genetic testing, you may have come across terms like PGT-A and PGT-SR. Both are types of preimplantation genetic testing (PGT) performed on embryos before transfer, but they look for different kinds of genetic issues. PGT-A (aneuploidy screening) checks for abnormal numbers of chromosomes, while PGT-SR (structural rearrangement testing) looks for unbalanced rearrangements of chromosome segments. Understanding the difference can help you have a more informed conversation with your fertility specialist.

    At a Glance: PGT-A vs PGT-SR

    • PGT-A screens for aneuploidy – missing or extra whole chromosomes.
    • PGT-SR detects unbalanced structural rearrangements – when parts of chromosomes are swapped, deleted, or duplicated.
    • Both tests require IVF and biopsy of embryos.
    • Neither test can guarantee a healthy baby or eliminate all genetic risks.

    What Is PGT-A?

    PGT-A, previously known as preimplantation genetic screening (PGS), is designed to identify embryos with an abnormal number of chromosomes. Humans typically have 46 chromosomes – 23 from each parent. Aneuploidy occurs when an embryo has extra or missing chromosomes, which can lead to implantation failure, miscarriage, or conditions such as Down syndrome (trisomy 21).

    PGT-A is often considered for patients who are older, have experienced recurrent miscarriage, or have had multiple failed IVF cycles. However, it is not a routine requirement for everyone, and its benefit depends on individual circumstances.

    What Is PGT-SR?

    PGT-SR is used when one or both partners carry a structural chromosomal rearrangement, such as a balanced translocation or inversion. These rearrangements usually do not affect the carrier’s health, but they can lead to embryos with unbalanced genetic material, increasing the risk of miscarriage or a child with disabilities.

    PGT-SR identifies embryos that have inherited a balanced set of chromosomes, similar to the carrier parent, or a completely normal set. This can help reduce the chance of transferring an embryo with unbalanced rearrangements.

    Key Differences Between PGT-A and PGT-SR

    Aspect PGT-A PGT-SR
    What it tests Number of chromosomes (aneuploidy) Structural rearrangements (unbalanced)
    Who might consider it Patients with advanced maternal age, recurrent miscarriage, or repeated implantation failure Couples where one partner carries a balanced translocation or inversion
    How it works Biopsied cells are analyzed for chromosome copy number Biopsied cells are analyzed for chromosomal structure and balance
    Limitations Cannot detect all genetic abnormalities; may not improve live birth rates for all patients Cannot detect all structural rearrangements; may not eliminate all risks

    When Might PGT-A or PGT-SR Be Recommended?

    Your doctor may suggest PGT-A if you have specific risk factors for aneuploidy. PGT-SR is typically recommended when a chromosomal rearrangement is known in either partner. However, the decision to use either test should be based on your medical history, family planning goals, and a thorough discussion with your fertility team.

    It is important to note that neither test is mandatory for all IVF patients. Some people may choose not to test, and others may opt for alternative approaches such as prenatal testing during pregnancy.

    Limitations and Considerations

    Both PGT-A and PGT-SR have limitations. They require a biopsy of the embryo, which is an invasive step, though risks are generally low. The tests are highly accurate but not perfect – there is a small chance of a false result. Also, these tests cannot detect all genetic conditions, such as single-gene disorders (which would require PGT-M).

    Furthermore, having a “normal” result does not guarantee a successful pregnancy or a healthy baby. Many factors contribute to IVF success, including embryo quality, uterine environment, and overall health.

    Questions to Ask Your Clinic

    • Why do you recommend PGT-A or PGT-SR for my situation?
    • What are the risks and benefits of the test?
    • How many embryos are typically biopsied, and what is the likelihood of having no embryos to transfer?
    • What is the accuracy rate of the test at your lab?
    • Are there alternative options, such as prenatal testing?

    Next Steps

    If you are considering PGT, start by discussing your medical history and family-building goals with a fertility specialist. They can help you understand whether PGT-A, PGT-SR, or another type of testing might be appropriate. You can also explore our PGT in Thailand guide and other guides for more information. For general questions, visit our FAQ page.

    Frequently asked questions

    Can PGT-A and PGT-SR be done at the same time?

    Yes, in some cases both tests can be performed on the same embryo biopsy. However, the decision depends on your specific genetic situation and the laboratory’s capabilities. Your clinic can advise whether combined testing is appropriate for you.

    Does PGT-A improve the chance of having a baby?

    PGT-A may reduce the risk of transferring an embryo with an abnormal number of chromosomes, which could lower the chance of miscarriage. However, it does not guarantee a live birth, and its overall benefit varies by patient. Discuss your individual prognosis with your doctor.

    Is PGT-SR only for people with a known chromosomal rearrangement?

    Typically, yes. PGT-SR is most useful when one partner is known to carry a balanced translocation or inversion. Without such a finding, PGT-SR is unlikely to be recommended.

    Are there risks to the embryo from biopsy?

    Embryo biopsy is generally considered safe, but it is an invasive procedure. There is a small risk of damage to the embryo, though this is rare. Your clinic will explain the specific risks and benefits in your case.

    Continue your research

    Medical information notice: This article is educational and does not replace individual assessment, diagnosis, genetic counselling or treatment advice from a licensed clinician. Provider services, availability, fees and policies should be verified directly before booking.

  • How Much Does PGT-A Testing Cost in Thailand? A Guide to Understanding the Price

    If you are exploring IVF with preimplantation genetic testing for aneuploidy (PGT-A) in Thailand, one of the first questions you likely have is: “How much does it cost?” The honest answer is that there is no single fixed price. PGT-A costs in Thailand can vary significantly depending on several factors, including the number of embryos tested, the laboratory fees, and the specific package your clinic offers. This guide breaks down the cost components and provides practical questions to ask when comparing quotes.

    At a Glance: Key Cost Factors

    • Number of embryos tested: Most clinics charge per embryo, so the total cost rises with more embryos.
    • Laboratory fees: PGT-A requires specialized lab equipment and expertise, which is reflected in the price.
    • Clinic packages: Some clinics bundle PGT-A with IVF cycles, which may offer savings compared to separate fees.
    • Additional services: Genetic counseling, biopsy procedures, and shipping (if samples are sent abroad) may add to the total.

    Understanding the Cost Components

    PGT-A is a multi-step process that involves embryo biopsy, genetic analysis, and often genetic counseling. Each step has associated costs that contribute to the final price.

    Embryo Biopsy

    Before testing, a few cells are removed from each embryo. This procedure requires skilled embryologists and specialized equipment. The biopsy fee is typically charged per embryo or as part of a package.

    Genetic Analysis

    The biopsied cells are sent to a genetics laboratory to analyze the chromosomes. This analysis can be done in-house or at an external lab. The cost depends on the technology used (e.g., next-generation sequencing) and the number of embryos tested.

    Genetic Counseling

    Many clinics include a session with a genetic counselor to help you understand the results and their implications. This may be included in the package or billed separately.

    Why Prices Vary Between Clinics

    Thailand has many fertility clinics, each with its own pricing structure. Some factors that influence price differences include:

    • Location: Clinics in Bangkok may have higher overhead costs than those in other cities.
    • Laboratory accreditation: Labs with international accreditation may charge more for their services.
    • Technology: Clinics using the latest genetic testing platforms may have higher fees.
    • Included services: Some packages include medications, monitoring, or additional tests, which can affect the overall price.

    What to Ask When Comparing Quotes

    When you receive quotes from different clinics, it is essential to ask detailed questions to understand what is included and what is not. Here are some questions to consider:

    • Is the biopsy fee included in the PGT-A price, or is it separate?
    • Are there additional charges for embryo freezing or storage?
    • Does the price include genetic counseling before and after testing?
    • Are there discounts for testing multiple embryos?
    • What is the turnaround time for results, and does that affect the cost?
    • Are there any hidden fees, such as shipping or administrative charges?

    Potential Additional Costs

    Beyond the basic PGT-A fee, you may encounter other expenses. These can include:

    • IVF cycle costs: PGT-A is usually performed in conjunction with IVF, so you will need to factor in the cost of the IVF cycle itself.
    • Medication: Fertility medications are often not included in PGT-A quotes.
    • Travel and accommodation: If you are traveling to Thailand, you will need to budget for flights, hotels, and local transportation.
    • Follow-up treatments: If you need additional IVF cycles or embryo transfers, these will incur separate costs.

    How to Plan Your Budget

    Since exact prices are not available without a clinic consultation, it is wise to plan for a range. Start by researching clinics and requesting detailed quotes. Then, consider the following steps:

    1. Compare packages: Look at what each clinic includes in its PGT-A package and compare the total cost of IVF plus PGT-A.
    2. Ask about payment plans: Some clinics offer installment options or financing.
    3. Check for hidden fees: Ask for a full breakdown of all charges.
    4. Consider the number of embryos: Estimate how many embryos you might have based on your age and previous IVF history, and ask for a per-embryo price.

    Next Steps

    To get a clear picture of PGT-A costs in Thailand, you will need to contact clinics directly. Prepare a list of questions and ask for a written quote. Remember that the cheapest option is not always the best; consider the clinic’s experience, laboratory standards, and success rates (though success rates are not guaranteed).

    For more information on IVF costs in Thailand, visit our IVF cost guide. You can also explore our patient resources for additional support. If you have specific questions, feel free to contact us.

    Frequently Asked Questions

    Is PGT-A covered by insurance in Thailand?

    Most international insurance plans do not cover PGT-A, as it is considered an elective procedure. It is best to check with your insurance provider to see if any coverage is available.

    Can I negotiate PGT-A prices with clinics?

    Some clinics may be open to negotiation, especially if you are testing multiple embryos or combining PGT-A with other services. It never hurts to ask.

    Are there any government subsidies for PGT-A in Thailand?

    There are no known government subsidies for PGT-A in Thailand. The cost is typically borne by the patient.

    How long does PGT-A testing take?

    The testing process usually takes about 1-2 weeks after the biopsy, but this can vary by lab. Ask your clinic for their specific turnaround time.

    Frequently asked questions

    Is PGT-A covered by insurance in Thailand?

    Most international insurance plans do not cover PGT-A, as it is considered an elective procedure. It is best to check with your insurance provider to see if any coverage is available.

    Can I negotiate PGT-A prices with clinics?

    Some clinics may be open to negotiation, especially if you are testing multiple embryos or combining PGT-A with other services. It never hurts to ask.

    Are there any government subsidies for PGT-A in Thailand?

    There are no known government subsidies for PGT-A in Thailand. The cost is typically borne by the patient.

    How long does PGT-A testing take?

    The testing process usually takes about 1-2 weeks after the biopsy, but this can vary by lab. Ask your clinic for their specific turnaround time.

    Continue your research

    Medical information notice: This article is educational and does not replace individual assessment, diagnosis, genetic counselling or treatment advice from a licensed clinician. Provider services, availability, fees and policies should be verified directly before booking.

  • PGT-A vs PGT-M: What’s the Difference and Which Do You Need?

    PGT-A vs PGT-M: What’s the Difference?

    If you’re considering IVF and genetic testing of embryos, you may have come across the terms PGT-A and PGT-M. Both are types of preimplantation genetic testing (PGT), but they serve different purposes. In short, PGT-A screens embryos for an abnormal number of chromosomes (aneuploidy), while PGT-M tests for specific single-gene disorders that one or both parents carry. Understanding the difference can help you have more informed conversations with your fertility clinic about which test, if any, is right for your situation.

    At a Glance: PGT-A vs PGT-M

    • PGT-A (Preimplantation Genetic Testing for Aneuploidy) checks for extra or missing chromosomes, which are a common cause of implantation failure and miscarriage.
    • PGT-M (Preimplantation Genetic Testing for Monogenic Disorders) looks for specific inherited conditions caused by a single gene, such as cystic fibrosis or sickle cell disease.
    • PGT-SR (Preimplantation Genetic Testing for Structural Rearrangements) is used when a parent has a chromosomal rearrangement, like a translocation.
    • Both tests require IVF and embryo biopsy, and they can be performed together if needed.

    What Is PGT-A?

    PGT-A is a screening test that evaluates embryos for aneuploidy—having too many or too few chromosomes. A normal human embryo should have 46 chromosomes (23 pairs). Aneuploidy can lead to failed implantation, miscarriage, or conditions like Down syndrome (trisomy 21). PGT-A is often recommended for women of advanced maternal age, couples with recurrent pregnancy loss, or those who have had multiple failed IVF cycles. However, it is not a guarantee of pregnancy or a healthy baby; it simply helps select embryos that are more likely to be chromosomally normal.

    What Is PGT-M?

    PGT-M is a diagnostic test for specific monogenic disorders—conditions caused by a mutation in a single gene. If you or your partner carry a known genetic mutation, PGT-M can identify embryos that have inherited the disorder, are carriers, or are unaffected. This test is typically used for couples with a known family history of a genetic disease, such as Huntington’s disease, thalassemia, or muscular dystrophy. PGT-M requires prior knowledge of the specific genetic mutation and often involves building a personalized test for each family.

    Key Differences Between PGT-A and PGT-M

    Aspect PGT-A PGT-M
    Purpose Screens for chromosomal abnormalities (aneuploidy) Tests for specific single-gene disorders
    Who might consider it Women over 35, recurrent miscarriage, repeated implantation failure Couples with known genetic mutations or family history
    What it detects Extra or missing chromosomes Specific gene mutations
    Requires prior genetic information? No Yes, the specific mutation must be known
    Result interpretation Embryo classified as normal, abnormal, or mosaic Embryo classified as affected, carrier, or unaffected

    When Is Each Test Recommended?

    PGT-A is generally offered to patients who have no known genetic disorder but want to reduce the risk of chromosomal abnormalities. It may be particularly useful for women of advanced maternal age, as the risk of aneuploidy increases with age. PGT-M is recommended when one or both partners are carriers of a genetic mutation that could cause a serious condition in their child. In some cases, both tests are performed together—for example, a couple undergoing PGT-M for a single-gene disorder may also opt for PGT-A to screen for chromosomal issues.

    How Do PGT-A and PGT-M Complement Each Other?

    PGT-A and PGT-M are not mutually exclusive; they can be used together to provide a more complete picture of an embryo’s genetic status. For instance, a couple with a known genetic mutation might use PGT-M to select embryos free of the disorder, while also using PGT-A to ensure those embryos have the correct number of chromosomes. This combined approach can increase the likelihood of transferring a viable embryo, but it does not guarantee success.

    What Are the Limitations of PGT?

    It’s important to understand that PGT has limitations. PGT-A cannot detect all genetic abnormalities, and a ‘normal’ result does not guarantee a healthy baby. PGT-M is highly accurate for the specific mutation tested, but it does not screen for other genetic conditions. Additionally, the biopsy process carries a small risk of embryo damage, and not all embryos may survive the testing process. PGT is not a substitute for prenatal testing, and many clinics recommend confirmatory testing during pregnancy.

    Questions to Ask Your Clinic

    • Which type of PGT do you recommend for my situation, and why?
    • What is the accuracy rate for the specific test you offer?
    • How many embryos typically survive the biopsy and testing process?
    • What are the costs involved, and are they covered by insurance?
    • How long does it take to get results?
    • What are the risks and limitations of the test?

    Next Steps: Making an Informed Decision

    1. Consult with a fertility specialist to review your medical history and any genetic risks.
    2. If considering PGT-M, undergo genetic counseling and testing to identify specific mutations.
    3. Discuss with your clinic whether PGT-A, PGT-M, or both are appropriate for you.
    4. Ask about the laboratory’s experience and accreditation.
    5. Consider the emotional and financial implications before proceeding.

    For more information about PGT in Thailand, visit our PGT in Thailand page. You can also explore our guides and FAQ sections for additional insights.

    Frequently asked questions

    Can PGT-A and PGT-M be done at the same time?

    Yes, PGT-A and PGT-M can be performed on the same embryo biopsy. This is often done when a couple has a known genetic mutation and also wants to screen for chromosomal abnormalities. However, not all clinics offer combined testing, so it's important to ask your provider.

    Is PGT-A necessary for everyone doing IVF?

    No, PGT-A is not necessary for everyone. It is typically recommended for women of advanced maternal age, those with recurrent pregnancy loss, or repeated implantation failure. Younger women with no known risk factors may not benefit significantly. Discuss your individual situation with your doctor.

    What is the difference between PGT-A and PGT-SR?

    PGT-A screens for an abnormal number of chromosomes (aneuploidy), while PGT-SR is used when a parent has a structural rearrangement of chromosomes, such as a translocation. PGT-SR detects embryos with unbalanced chromosomal rearrangements that could lead to miscarriage or birth defects.

    How accurate is PGT-M?

    PGT-M is highly accurate for the specific mutation it is designed to detect, with accuracy rates typically above 95%. However, there is a small risk of misdiagnosis due to technical limitations or genetic recombination. Confirmatory prenatal testing is often recommended.

    Does PGT guarantee a healthy baby?

    No, PGT does not guarantee a healthy baby. It can reduce the risk of transferring embryos with specific genetic issues, but it cannot detect all potential problems. Many factors affect pregnancy outcome, and prenatal testing is still recommended.

    Continue your research

    Medical information notice: This article is educational and does not replace individual assessment, diagnosis, genetic counselling or treatment advice from a licensed clinician. Provider services, availability, fees and policies should be verified directly before booking.

  • How to Interpret PGT-A Results from a Thai Lab

    What Is PGT-A and Why Is It Used?

    Preimplantation Genetic Testing for Aneuploidy (PGT-A) is a screening technique used during in vitro fertilization (IVF) to analyze embryos for chromosomal abnormalities. The goal is to identify embryos with the correct number of chromosomes (euploid) before transfer, potentially improving the chances of implantation and reducing the risk of miscarriage or genetic disorders. PGT-A does not test for all genetic conditions; it focuses on chromosome number changes.

    Understanding PGT-A Result Categories

    Thai laboratories typically report PGT-A results in three main categories:

    • Euploid: The embryo has the expected number of chromosomes (46 in humans). These embryos are considered chromosomally normal and are generally prioritized for transfer.
    • Aneuploid: The embryo has missing or extra chromosomes (e.g., trisomy 21, monosomy X). These embryos are unlikely to result in a healthy pregnancy and are usually not recommended for transfer.
    • Mosaic: The embryo has a mixture of euploid and aneuploid cells. The degree of mosaicism (low, medium, high) can affect transfer recommendations. Some low-level mosaic embryos may be considered for transfer if no euploid embryos are available, after genetic counseling.

    How Thai Labs Report PGT-A Results

    Thai labs typically provide a report that includes:

    • Embryo identification number
    • Biopsy date and testing method (e.g., next-generation sequencing)
    • Chromosomal analysis for each chromosome pair
    • Result classification: euploid, aneuploid, or mosaic (with percentage if applicable)
    • Sex chromosome status (if requested)

    Reports may also include a comment on embryo quality and recommendations. It is important to note that reporting formats can vary between laboratories. Always request a copy of the full report and discuss it with your fertility specialist.

    What to Ask Your Doctor About Transferability

    When reviewing your PGT-A results, consider asking your doctor these questions:

    • Which embryos are euploid and recommended for transfer?
    • If mosaic embryos are present, what is the level of mosaicism and what are the potential risks and outcomes?
    • Are there any aneuploid embryos that might be considered for transfer under exceptional circumstances?
    • How does the lab’s classification system affect transfer decisions?
    • What additional testing (e.g., PGT-M for single gene disorders) might be needed?

    Limitations of PGT-A

    PGT-A is a screening tool, not a diagnostic test. It has limitations:

    • It cannot detect all genetic disorders, such as single-gene mutations or structural rearrangements.
    • Mosaicism may be underestimated or overestimated due to biopsy sampling.
    • Euploid embryos do not guarantee pregnancy or a healthy baby; other factors (e.g., uterine environment, embryo quality) also matter.
    • There is a small risk of misdiagnosis or no result from the biopsy.

    Next Steps After Receiving Results

    After reviewing your PGT-A results with your doctor, you may consider:

    • Discussing transfer options for euploid embryos
    • Exploring additional genetic counseling if mosaic or aneuploid results are present
    • Considering further testing (e.g., PGT-M) if a specific genetic condition is a concern
    • Reviewing your IVF cycle plan and timing for frozen embryo transfer

    For more information, see our PGT in Thailand overview, patient guides, and frequently asked questions.

    Frequently asked questions

    What does euploid mean in PGT-A results?

    Euploid means the embryo has the correct number of chromosomes (46 in humans). These embryos are considered chromosomally normal and are typically prioritized for transfer.

    Can a mosaic embryo be transferred?

    In some cases, low-level mosaic embryos may be considered for transfer if no euploid embryos are available. This decision should be made after thorough genetic counseling and discussion of potential risks with your doctor.

    How accurate are PGT-A results from Thai labs?

    Thai labs generally use validated technologies like next-generation sequencing, but no test is 100% accurate. There is a small risk of misdiagnosis or no result. Discuss the lab's quality controls and success rates with your clinic.

    Do I need PGT-A for all embryos?

    PGT-A is optional and not recommended for all patients. It is often considered for women of advanced maternal age, those with recurrent pregnancy loss, or previous aneuploidy. Your doctor can help determine if it is appropriate for you.

    What questions should I ask about my PGT-A report?

    Ask your doctor to explain each result category, the level of mosaicism if present, and how the lab's classification affects transfer recommendations. Also inquire about the need for additional testing or genetic counseling.

    Continue your research

    Medical information notice: This article is educational and does not replace individual assessment, diagnosis, genetic counselling or treatment advice from a licensed clinician. Provider services, availability, fees and policies should be verified directly before booking.

  • How to Compare PGT-A and PGT-SR in Thailand

    Preimplantation genetic testing (PGT) helps identify genetic abnormalities in embryos created through IVF before transfer. Two common types are PGT-A (for aneuploidy) and PGT-SR (for structural rearrangements). While both involve embryo biopsy and genetic analysis, they address different genetic issues. This guide explains the differences, when each is recommended, and what to consider when comparing them in Thailand.

    What Is PGT-A?

    PGT-A (preimplantation genetic testing for aneuploidy) screens embryos for an abnormal number of chromosomes (aneuploidy). Humans typically have 46 chromosomes (23 pairs). Aneuploidy means an embryo has extra or missing chromosomes, which often leads to implantation failure, miscarriage, or conditions like Down syndrome (trisomy 21). PGT-A checks all 23 pairs of chromosomes for correct number.

    What Is PGT-SR?

    PGT-SR (preimplantation genetic testing for structural rearrangements) is designed for patients who carry a balanced structural rearrangement in their chromosomes, such as a translocation (Robertsonian or reciprocal) or inversion. These rearrangements do not usually cause health problems for the carrier, but they can lead to unbalanced chromosomes in embryos, increasing the risk of miscarriage or a child with a chromosomal disorder. PGT-SR identifies embryos with balanced or normal chromosomes.

    Key Differences Between PGT-A and PGT-SR

    Feature PGT-A PGT-SR
    Purpose Detect aneuploidy (abnormal chromosome number) Detect unbalanced structural rearrangements
    Who needs it Advanced maternal age, recurrent miscarriage, repeated IVF failure, or any patient wanting to reduce aneuploidy risk Patients known to carry a balanced translocation, inversion, or other structural rearrangement
    What it analyzes Number of copies of each chromosome (23 pairs) Breakpoints and copy number changes across specific chromosome regions
    Technology Next-generation sequencing (NGS) or array comparative genomic hybridization (aCGH) NGS with specific analysis for structural rearrangements; sometimes combined with PGT-A
    Result categories Euploid (normal), aneuploid (abnormal), mosaic (mix of normal and abnormal cells) Balanced/normal, unbalanced (abnormal), or inconclusive

    How Are PGT-A and PGT-SR Performed in Thai Labs?

    Both tests require an IVF cycle to create embryos. On day 5 or 6 of development, a few cells are biopsied from the trophectoderm (the part that becomes the placenta). The biopsy is sent to a genetics laboratory for analysis. In Thailand, many IVF clinics partner with accredited genetic labs that use next-generation sequencing (NGS) for PGT-A and PGT-SR. The process is similar, but PGT-SR requires additional bioinformatics to detect breakpoints and unbalanced rearrangements.

    Timeline

    After biopsy, results typically take 7–14 days. Embryos are frozen (vitrified) while waiting for results. A subsequent frozen embryo transfer (FET) is performed in a later cycle.

    When Is Each Recommended?

    PGT-A is commonly considered for:

    • Women aged 35 or older
    • Couples with a history of recurrent miscarriage
    • Previous IVF cycles with poor embryo development or implantation failure
    • Patients who wish to reduce the chance of transferring an aneuploid embryo

    PGT-SR is specifically recommended for:

    • Individuals or couples where one partner carries a balanced translocation (Robertsonian or reciprocal)
    • Carriers of inversions or other structural rearrangements
    • Couples with a history of recurrent miscarriage due to unbalanced chromosomes

    Note: PGT-SR is not a routine test for all IVF patients. It is only indicated when a structural rearrangement is known or strongly suspected.

    Can PGT-A and PGT-SR Be Combined?

    Yes. Many genetic laboratories can perform both tests simultaneously on the same biopsy. This is often called “combined PGT” or “PGT-A+SR.” It screens for both aneuploidy and unbalanced structural rearrangements. This may be beneficial for translocation carriers who also have age-related aneuploidy risk. However, not all clinics offer combined testing; confirm with your clinic.

    Limitations and Considerations

    • Mosaicism: Both PGT-A and PGT-SR may detect mosaicism (a mix of normal and abnormal cells). Interpretation can be complex, and not all mosaic embryos are abnormal.
    • Accuracy: No test is 100% accurate. There is a small risk of misdiagnosis or inconclusive results.
    • Embryo loss: Biopsy and freezing may reduce embryo viability slightly, though vitrification techniques have improved outcomes.
    • Cost: PGT adds to the overall cost of IVF. PGT-SR may be more expensive due to specialized analysis.
    • Not a guarantee: PGT cannot guarantee a healthy baby or prevent all genetic conditions. It only screens for the specific abnormalities tested.

    Questions to Ask Your Clinic in Thailand

    • Which genetic laboratory do you work with? Is it accredited?
    • Do you offer combined PGT-A and PGT-SR?
    • What technology is used (NGS, aCGH)?
    • How long do results take?
    • What is the cost for PGT-A, PGT-SR, and combined testing?
    • How are mosaic embryos reported and counseled?
    • What is your experience with PGT-SR for translocation carriers?

    Next Steps

    1. Confirm your genetic status: If you have a known translocation or inversion, request a referral for genetic counseling.
    2. Choose an IVF clinic in Thailand that offers PGT-SR and has experience with structural rearrangements.
    3. Ask about the specific genetic lab and their success rates with PGT-SR.
    4. Discuss the possibility of combined PGT-A+SR if you are also concerned about aneuploidy.
    5. Plan for a frozen embryo transfer cycle after results are available.

    For more information, see our PGT in Thailand overview, guides, and FAQ.

    Frequently asked questions

    Can PGT-A detect structural rearrangements like translocations?

    Standard PGT-A screens for chromosome number abnormalities but does not reliably detect balanced structural rearrangements. PGT-SR is specifically designed for that purpose. However, PGT-A may sometimes pick up large unbalanced rearrangements, but it is not a substitute for PGT-SR.

    Is PGT-SR necessary for all IVF patients?

    No. PGT-SR is only recommended for patients who are known carriers of a balanced translocation, inversion, or other structural rearrangement. It is not a routine test for all IVF patients.

    How much does PGT-A and PGT-SR cost in Thailand?

    Costs vary by clinic and genetic laboratory. PGT-SR is often more expensive than PGT-A due to specialized analysis. Contact your chosen clinic for exact pricing.

    Can PGT-A and PGT-SR be done together?

    Yes, many labs offer combined testing (PGT-A+SR) on the same embryo biopsy. This screens for both aneuploidy and unbalanced structural rearrangements. Confirm availability with your clinic.

    What is the success rate of PGT-SR for translocation carriers?

    Success rates depend on many factors, including the type of translocation, maternal age, and embryo quality. PGT-SR can increase the chance of transferring a chromosomally normal embryo, but it does not guarantee pregnancy or live birth. Discuss expected outcomes with your clinic.

    Continue your research

    Medical information notice: This article is educational and does not replace individual assessment, diagnosis, genetic counselling or treatment advice from a licensed clinician. Provider services, availability, fees and policies should be verified directly before booking.

  • How Embryo Mosaicism Affects PGT Results in Thailand

    What Is Embryo Mosaicism?

    Embryo mosaicism occurs when an embryo contains two or more cell populations with different genetic compositions. For example, some cells may have a normal chromosome count (euploid), while others have an abnormal count (aneuploid). This is different from a uniformly euploid or uniformly aneuploid embryo. Mosaicism can involve whole chromosomes or segments, and the proportion of abnormal cells can vary widely.

    In preimplantation genetic testing for aneuploidy (PGT-A), mosaicism is detected when the genetic analysis of a biopsy sample (typically 5–10 cells from the trophectoderm) shows intermediate chromosome copy numbers that do not clearly classify as euploid or aneuploid. The reported level of mosaicism (e.g., low, medium, high) depends on the percentage of abnormal cells estimated by the laboratory.

    How Do Thai Labs Report Mosaicism?

    Thailand has several IVF laboratories that offer PGT-A using next-generation sequencing (NGS). Most Thai labs follow international guidelines, such as those from the Preimplantation Genetic Diagnosis International Society (PGDIS) or the American Society for Reproductive Medicine (ASRM), to classify mosaicism. However, reporting practices can vary between clinics.

    Typically, results are reported as:

    • Euploid: No chromosomal abnormalities detected within the sensitivity of the test.
    • Aneuploid: Uniformly abnormal chromosome count.
    • Mosaic: A mix of normal and abnormal cells, often with a percentage range (e.g., 20–40% abnormal). Some labs further categorize mosaicism as low (20–30%), medium (30–50%), or high (>50%).

    It is important to ask your specific clinic how they define and report mosaicism, as thresholds and terminology may differ. Some labs may also report segmental mosaicism (involving only part of a chromosome).

    What Does Mosaicism Mean for PGT Results?

    A mosaic result adds complexity to embryo selection. Unlike a clear euploid or aneuploid result, a mosaic embryo has an uncertain prognosis. Key points include:

    • Not a guarantee of abnormality: A mosaic embryo may still implant and develop into a healthy baby. The abnormal cells may be confined to the placenta or may not affect the fetus.
    • Risk of true fetal mosaicism: There is a small chance that the abnormal cell line is present in the fetus, which could lead to a genetic condition. The risk is generally considered higher with higher levels of mosaicism.
    • Lower implantation potential: Some studies suggest mosaic embryos have a slightly lower implantation rate compared to euploid embryos, but many have resulted in healthy live births.

    Because of this uncertainty, PGT results for mosaic embryos are often reported as “inconclusive” or “intermediate,” and genetic counseling is strongly recommended before transfer.

    Transfer Considerations for Mosaic Embryos

    Deciding whether to transfer a mosaic embryo involves balancing the chance of a healthy pregnancy against the risk of genetic abnormality. Factors to consider include:

    • Level and type of mosaicism: Low-level mosaicism for certain chromosomes may carry lower risk than high-level or complex mosaicism.
    • Availability of euploid embryos: If there are euploid embryos available, they are typically prioritized. Mosaic embryos are often considered only when no euploid embryos exist.
    • Patient age and reproductive history: Older patients or those with few embryos may be more willing to consider mosaic transfer.
    • Genetic counseling: A qualified genetic counselor can help interpret the specific mosaic finding and discuss potential outcomes, including the option of prenatal diagnosis (e.g., chorionic villus sampling or amniocentesis) if pregnancy occurs.

    In Thailand, the decision to transfer a mosaic embryo is made jointly by the patient and the treating physician, often after counseling. Some clinics may have specific policies regarding mosaic embryo transfer, so it is essential to discuss this with your clinic beforehand.

    Questions to Ask Your Clinic About Mosaicism

    To make an informed decision, consider asking your Thai IVF clinic the following questions:

    • How does your lab define and report mosaicism? What thresholds do you use?
    • Do you offer genetic counseling for mosaic results?
    • What is your clinic’s policy on transferring mosaic embryos?
    • Can you provide data on outcomes of mosaic embryo transfers at your clinic?
    • What follow-up testing (e.g., prenatal diagnosis) is recommended if a mosaic embryo is transferred and results in pregnancy?

    Next Steps

    If you have received a mosaic embryo result, take the following steps:

    1. Request a detailed report from your clinic, including the specific chromosome involved and the estimated percentage of mosaicism.
    2. Schedule a consultation with a genetic counselor who can explain the risks and options.
    3. Discuss with your fertility specialist whether transfer of the mosaic embryo is appropriate given your individual circumstances.
    4. Consider the possibility of additional testing, such as re-biopsy or further genetic analysis, if available and recommended.

    Remember that PGT-A is a screening tool, not a diagnostic test. Mosaic results require careful interpretation and should not be the sole factor in decision-making.

    Frequently asked questions

    Can a mosaic embryo result in a healthy baby?

    Yes, many mosaic embryos have resulted in healthy live births. The abnormal cells may be confined to the placenta or may not affect fetal development. However, the risk of a genetic condition is higher than with a euploid embryo, and genetic counseling is recommended.

    How is mosaicism detected in PGT-A?

    Mosaicism is detected when next-generation sequencing (NGS) of a biopsy sample shows intermediate chromosome copy numbers that do not clearly indicate euploidy or aneuploidy. The estimated percentage of abnormal cells is reported.

    Should I transfer a mosaic embryo if I have euploid embryos?

    Generally, euploid embryos are prioritized for transfer because they have a higher chance of implantation and lower risk of genetic abnormality. Mosaic embryos are typically considered only when no euploid embryos are available.

    Do all Thai IVF clinics report mosaicism the same way?

    No, reporting practices can vary. Some clinics may use different thresholds or terminology. It is important to ask your specific clinic how they define and report mosaicism.

    What prenatal testing is recommended after transferring a mosaic embryo?

    If a mosaic embryo transfer results in pregnancy, prenatal diagnostic tests such as chorionic villus sampling (CVS) or amniocentesis may be recommended to check for fetal mosaicism. Discuss this with your doctor.

    Continue your research

    Medical information notice: This article is educational and does not replace individual assessment, diagnosis, genetic counselling or treatment advice from a licensed clinician. Provider services, availability, fees and policies should be verified directly before booking.

  • PGT-A Success for Women Under 35 in Thailand: What to Expect

    What Is PGT-A and How Does It Relate to Age?

    Preimplantation Genetic Testing for Aneuploidy (PGT-A) screens embryos for chromosomal abnormalities before transfer. For women under 35, the chance of producing chromosomally normal embryos is generally higher than for older women. However, PGT-A does not guarantee a pregnancy or live birth—it helps select embryos with the correct number of chromosomes, which may reduce the risk of miscarriage and failed implantation.

    Does PGT-A Improve Success for Younger Women?

    Research suggests that for women under 35, PGT-A can increase the per-transfer implantation rate by avoiding aneuploid embryos. However, the overall live birth rate per cycle may not differ significantly because many younger women already have a high proportion of normal embryos. The main benefit is often a shorter time to pregnancy by transferring a euploid embryo first, rather than attempting multiple transfers with untested embryos.

    Clinic Variability in Thailand

    Success rates for PGT-A vary among clinics in Thailand due to differences in laboratory protocols, embryologist expertise, and biopsy techniques. Some clinics may report higher implantation rates after PGT-A, but these figures are not standardized. When comparing clinics, ask for their specific PGT-A outcomes for women under 35, including the number of cycles, euploidy rates, and live birth rates per transfer.

    Benefits and Limitations of PGT-A

    Potential Benefits

    • Reduced risk of miscarriage from chromosomal abnormalities
    • Higher implantation rate per transfer
    • Fewer failed transfers and shorter time to pregnancy
    • Possibility of single embryo transfer, lowering multiple pregnancy risk

    Limitations

    • PGT-A cannot detect all genetic disorders or structural abnormalities
    • Embryo biopsy carries a small risk of damage (though low with experienced labs)
    • Mosaic embryos (with both normal and abnormal cells) may be discarded unnecessarily
    • PGT-A does not guarantee a healthy baby
    • Cost and time added to the IVF cycle

    Questions to Ask Your Clinic

    • What is your euploidy rate for women under 35?
    • What is your live birth rate per transfer after PGT-A for this age group?
    • How do you handle mosaic embryos?
    • What is your biopsy technique and experience?
    • What are the additional costs for PGT-A?

    Alternatives to PGT-A

    For women under 35 with no known genetic issues, some clinics may recommend transferring untested embryos, especially if the patient has a good prognosis. Other options include time-lapse imaging or preimplantation genetic screening for specific conditions (PGT-M or PGT-SR) if indicated. Discuss with your doctor whether PGT-A is likely to add value in your case.

    Next Steps

    If you are considering PGT-A in Thailand, start by consulting with a fertility specialist to review your medical history and goals. Request detailed success data from clinics and ask about their experience with younger patients. Remember that PGT-A is a tool to aid selection, not a guarantee of outcome.

    Frequently asked questions

    Is PGT-A recommended for all women under 35?

    No. PGT-A is typically recommended for women with recurrent miscarriage, previous aneuploidy, or advanced maternal age. For younger women with no known issues, the benefit may be smaller. Discuss with your doctor whether PGT-A is appropriate for you.

    What is the euploidy rate for women under 35?

    Euploidy rates vary by clinic and individual factors, but generally, women under 35 have a higher proportion of normal embryos compared to older women. Exact figures should be obtained from your clinic.

    Does PGT-A increase the chance of a live birth?

    PGT-A can improve the per-transfer live birth rate by selecting euploid embryos, but the overall live birth rate per cycle may not differ significantly for younger women. It may reduce time to pregnancy by avoiding failed transfers.

    What are the risks of PGT-A?

    Risks include embryo damage from biopsy (rare with experienced labs), the possibility of discarding mosaic embryos that could implant, and the added cost and time. PGT-A does not guarantee a healthy baby.

    How much does PGT-A cost in Thailand?

    Costs vary by clinic and the number of embryos tested. Contact clinics directly for a detailed fee schedule. PGT-A is an additional expense on top of standard IVF costs.

    Continue your research

    Medical information notice: This article is educational and does not replace individual assessment, diagnosis, genetic counselling or treatment advice from a licensed clinician. Provider services, availability, fees and policies should be verified directly before booking.

  • IVF Success for Women Over 40 in Thailand: What You Need to Know

    If you are a woman over 40 considering IVF in Thailand, you likely want to know your chances of success. While exact success rates vary widely by individual and clinic, the most important factors are your age, ovarian reserve, egg quality, and whether you use your own eggs or donor eggs. This article explains these factors and what questions to ask when consulting a clinic.

    At a Glance: Key Factors for IVF Success After 40

    • Age and egg quality: Natural decline in egg quantity and quality accelerates after 35 and more sharply after 40.
    • Ovarian reserve: Measured by AMH and antral follicle count; lower reserve means fewer eggs retrieved.
    • Donor eggs: Using eggs from a younger donor significantly increases success rates.
    • PGT-A: Preimplantation genetic testing for aneuploidy can identify chromosomally normal embryos, which are more likely to implant.
    • Clinic experience: Choose a clinic with expertise in treating women over 40.

    How Age Affects IVF Success

    Female age is the single most important factor in IVF success. As women age, the number and quality of eggs decline. By age 40, many eggs have chromosomal abnormalities, which reduce the chance of a healthy pregnancy. This is why success rates with a woman’s own eggs are lower for women over 40 compared to younger women. However, success rates can be much higher when using donor eggs from a younger woman.

    Using Your Own Eggs vs. Donor Eggs

    If you plan to use your own eggs, your doctor will assess your ovarian reserve through blood tests (AMH) and ultrasound (antral follicle count). A low reserve may mean fewer eggs retrieved, which can reduce the chance of having a chromosomally normal embryo. Many women over 40 consider using donor eggs, which bypasses the age-related egg quality issue. Donor egg IVF success rates are generally high regardless of the recipient’s age, as the eggs come from a young, healthy donor.

    The Role of PGT-A (Genetic Testing of Embryos)

    PGT-A is a test performed on embryos before transfer to check for chromosomal abnormalities. For women over 40, a higher percentage of embryos may be abnormal. PGT-A can help select embryos with the best chance of implanting and developing into a healthy baby. However, PGT-A does not guarantee pregnancy, and some women may have no normal embryos to transfer. Discuss with your clinic whether PGT-A is recommended for your situation.

    Questions to Ask Your Clinic

    When consulting a clinic in Thailand, consider asking:

    • What is your experience treating women over 40?
    • What tests will you do to assess my ovarian reserve?
    • What are the options if my own eggs are not viable?
    • Do you recommend PGT-A, and what is the process?
    • What is the typical number of eggs retrieved for women my age?
    • What support services are available (counseling, etc.)?

    Next Steps

    Start by researching clinics that specialize in IVF for women over 40. Schedule consultations to discuss your specific medical history and receive personalized advice. Remember that success rates are not the only measure; consider the clinic’s approach, transparency, and the comfort you feel with the medical team.

    For more information, explore our FAQ and guides, or contact us for assistance.

    Frequently asked questions

    Can I have a successful IVF after 40 with my own eggs?

    It is possible, but success rates are lower due to age-related decline in egg quality. Your doctor can assess your ovarian reserve to give a more personalized estimate.

    Is donor egg IVF more successful for women over 40?

    Yes, donor egg IVF typically has higher success rates because the eggs come from a younger donor, bypassing age-related egg quality issues.

    What is PGT-A and should I consider it?

    PGT-A tests embryos for chromosomal abnormalities. For women over 40, it can help select embryos with the best chance of implantation, but it does not guarantee success and may result in no normal embryos.

    How do I choose a clinic in Thailand for IVF after 40?

    Look for clinics with experience treating older women, transparent communication about success rates, and services like donor eggs and PGT-A. Schedule consultations to ask specific questions.

    Continue your research

    Medical information notice: This article is educational and does not replace individual assessment, diagnosis, genetic counselling or treatment advice from a licensed clinician. Provider services, availability, fees and policies should be verified directly before booking.

  • PGT-A vs PGT-SR in Thailand: Key Differences for Patients with Chromosomal Rearrangements

    If you are considering IVF with preimplantation genetic testing (PGT) in Thailand, you may encounter two common types: PGT-A and PGT-SR. While both tests analyze embryos before transfer, they look for different genetic issues. PGT-A (aneuploidy screening) checks for an abnormal number of chromosomes, while PGT-SR (structural rearrangement testing) detects changes in chromosome structure, such as translocations or inversions. This article explains the key differences, who may benefit from each test, and what to consider when planning treatment in Thailand.

    At a Glance: PGT-A vs PGT-SR

    • PGT-A: Screens all 23 pairs of chromosomes for extra or missing chromosomes (aneuploidy). Used for advanced maternal age, recurrent miscarriage, or repeated implantation failure.
    • PGT-SR: Detects unbalanced structural rearrangements (e.g., translocations, inversions) in embryos. Recommended for patients who carry a balanced rearrangement themselves.
    • Both: Require embryo biopsy and genetic analysis. Results help select euploid (normal) embryos for transfer, potentially improving implantation and reducing miscarriage risk.

    What Is PGT-A?

    PGT-A (preimplantation genetic testing for aneuploidy) evaluates embryos for the correct number of chromosomes. Aneuploidy—having too many or too few chromosomes—is a leading cause of implantation failure, miscarriage, and conditions like Down syndrome. PGT-A is often recommended for women over 35, couples with recurrent pregnancy loss, or those with multiple failed IVF cycles. The test does not detect structural rearrangements or single-gene disorders.

    What Is PGT-SR?

    PGT-SR (preimplantation genetic testing for structural rearrangements) is designed for individuals who carry a balanced chromosomal rearrangement, such as a reciprocal or Robertsonian translocation, or an inversion. Carriers are usually healthy but may produce embryos with unbalanced rearrangements, leading to miscarriage or affected offspring. PGT-SR identifies embryos with balanced or normal chromosomes, allowing transfer of those with the best chance of healthy development.

    Key Differences Between PGT-A and PGT-SR

    Feature PGT-A PGT-SR
    What it detects Aneuploidy (extra/missing chromosomes) Unbalanced structural rearrangements
    Who it is for Advanced maternal age, recurrent miscarriage, repeated IVF failure Carriers of balanced translocations, inversions, or other structural changes
    Genetic cause Random errors in egg/sperm formation Inherited or de novo structural change in a parent
    Testing method NGS, aCGH, or SNP array on trophectoderm biopsy NGS with specific analysis for breakpoints, or aCGH/SNP array
    Result categories Euploid (normal), aneuploid, mosaic Balanced/normal, unbalanced, inconclusive

    Who Should Consider PGT-SR?

    PGT-SR is typically offered to couples where one partner has a known balanced chromosomal rearrangement. Common indications include:

    • History of recurrent miscarriage
    • Previous child with a structural chromosome abnormality
    • Known carrier of a translocation or inversion from karyotype testing
    • Male factor infertility due to structural rearrangement (e.g., Y chromosome microdeletion)

    If you have not had karyotype testing, your doctor may recommend it before considering PGT-SR.

    Testing Process in Thailand

    The process for both PGT-A and PGT-SR follows similar steps:

    1. IVF cycle: Ovarian stimulation, egg retrieval, fertilization (usually ICSI), and embryo culture to blastocyst stage (day 5-6).
    2. Embryo biopsy: A few cells are removed from the trophectoderm (future placenta) using a laser. The embryo is then vitrified (frozen).
    3. Genetic analysis: Biopsied cells are sent to a genetics laboratory. For PGT-SR, the lab must know the specific rearrangement to design the test.
    4. Results: Typically available within 1-2 weeks. A genetic counselor or doctor explains the results and which embryos are suitable for transfer.
    5. Frozen embryo transfer: A euploid or balanced embryo is thawed and transferred in a subsequent cycle.

    In Thailand, many IVF clinics offer PGT in collaboration with accredited genetic laboratories. Turnaround times and costs vary; confirm details directly with your chosen clinic.

    Questions to Ask Your Clinic

    • Do you offer both PGT-A and PGT-SR? Which laboratory do you work with?
    • How many embryos typically reach the blastocyst stage for biopsy?
    • What is the success rate for frozen embryo transfers after PGT?
    • How are mosaic embryos (with mixed normal and abnormal cells) handled?
    • Is genetic counseling included in the process?
    • What are the costs for PGT-A vs PGT-SR, and are there additional fees for transport or storage?

    Limitations and Considerations

    Neither PGT-A nor PGT-SR guarantees a pregnancy or a healthy baby. Both tests have limitations:

    • Embryo biopsy carries a small risk of damage, though modern techniques are safe.
    • PGT cannot detect all genetic conditions, such as single-gene disorders (for that, PGT-M is used).
    • Mosaicism can lead to inconclusive results.
    • PGT-SR requires prior knowledge of the parental rearrangement; if the breakpoints are not well characterized, the test may be less accurate.
    • Not all embryos will be suitable for biopsy or freezing; some may not survive the process.

    Discuss these limitations with your fertility specialist to make an informed decision.

    Next Steps

    • If you suspect a chromosomal rearrangement, ask your doctor for a karyotype test.
    • Research IVF clinics in Thailand that offer PGT-SR and have experience with structural rearrangements.
    • Prepare for a consultation with a list of questions about testing protocols, success rates, and costs.
    • Consider genetic counseling to understand the implications of test results.

    For more information, explore our PGT in Thailand guide, patient guides, and frequently asked questions.

    Frequently asked questions

    Can PGT-A detect structural rearrangements like translocations?

    No, PGT-A is designed to detect aneuploidy (abnormal chromosome number), not structural rearrangements. PGT-SR is specifically needed to identify unbalanced translocations or inversions.

    Do I need PGT-SR if I have a balanced translocation?

    PGT-SR is often recommended for carriers of balanced translocations to select embryos with balanced or normal chromosomes, reducing the risk of miscarriage or having a child with a chromosomal disorder. However, not all carriers require PGT; discuss your specific situation with a genetic counselor.

    Is PGT-SR available in Thailand?

    Yes, many IVF clinics in Thailand offer PGT-SR in collaboration with genetic laboratories. Availability and protocols vary, so confirm directly with the clinic.

    How long does it take to get PGT-SR results?

    Results typically take 1-2 weeks after embryo biopsy, depending on the laboratory and the complexity of the rearrangement.

    What is the difference between balanced and unbalanced translocation?

    A balanced translocation means the chromosome material is rearranged but no genetic material is lost or gained; carriers are usually healthy. An unbalanced translocation results in extra or missing genetic material, which can cause miscarriage or birth defects.

    Continue your research

    Medical information notice: This article is educational and does not replace individual assessment, diagnosis, genetic counselling or treatment advice from a licensed clinician. Provider services, availability, fees and policies should be verified directly before booking.