Receiving your PGT-A results can feel overwhelming. This guide explains the common result categories—euploid, aneuploid, and mosaic—and the limitations of the test, so you can have a more informed conversation with your doctor in Thailand.
At a Glance: PGT-A Result Categories
- Euploid: Normal chromosome number, often considered transferable.
- Aneuploid: Abnormal chromosome number, usually not recommended for transfer.
- Mosaic: Mix of normal and abnormal cells, with varying clinical implications.
What Is PGT-A?
Preimplantation Genetic Testing for Aneuploidy (PGT-A) is a screening test performed on embryos created through IVF. It checks for the correct number of chromosomes. Having too many or too few chromosomes can lead to implantation failure, miscarriage, or genetic conditions like Down syndrome.
PGT-A is not a guarantee of a healthy baby, and it does not test for all genetic disorders. It is one tool among many in fertility treatment.
Understanding Your PGT-A Report
Your PGT-A report will typically list each embryo tested and its result. Here are the main categories:
Euploid
Euploid embryos have the expected number of chromosomes (46 in humans). These are often prioritized for transfer because they have the highest chance of implanting and developing normally. However, a euploid result does not guarantee pregnancy or a healthy child.
Aneuploid
Aneuploid embryos have an abnormal number of chromosomes. For example, trisomy 21 (three copies of chromosome 21) causes Down syndrome. Most aneuploid embryos will not implant or will miscarry. Transfer of aneuploid embryos is generally not recommended, but your doctor can discuss any rare exceptions.
Mosaic
Mosaic embryos have a mixture of normal and abnormal cells. The percentage of abnormal cells and which chromosomes are affected influence the outcome. Some mosaic embryos can develop into healthy babies, but the risk of miscarriage or genetic issues is higher than with euploid embryos. Your doctor will help you weigh the options.
Limitations of PGT-A
PGT-A is a screening test, not a diagnostic test. It cannot detect all genetic problems, and it does not assess the embryo’s overall quality or potential for implantation. The biopsy samples only a few cells, which may not represent the entire embryo. Additionally, PGT-A cannot predict the health of the child after birth.
In Thailand, PGT-A is performed in specialized laboratories. The accuracy of the test depends on the laboratory’s techniques and the embryo’s stage at biopsy. Discuss these factors with your clinic.
How to Discuss Results with Your Doctor
When you receive your PGT-A report, prepare questions for your doctor. Here are some to consider:
- What does this result mean for my chances of pregnancy?
- Are there any additional tests I should consider?
- What is the recommended next step for each embryo?
- How does my age or medical history affect the interpretation?
Your doctor in Thailand will explain the results in the context of your individual situation. Take notes and ask for clarification if anything is unclear.
Next Steps After PGT-A Results
After reviewing your results, you and your doctor will decide which embryos to transfer. If you have no euploid embryos, you may consider additional IVF cycles or alternative options. If you have mosaic embryos, you may discuss the risks and benefits of transfer.
Remember that PGT-A is optional and not suitable for everyone. Your doctor can help you understand if it is right for you.
Questions to Ask Your Clinic
- What is the laboratory’s experience with PGT-A?
- How are mosaic embryos classified and reported?
- What is the policy on transferring mosaic embryos?
- Are there any additional costs for PGT-A?
Checklist for Your Next Appointment
- Bring a copy of your PGT-A report.
- List your questions in advance.
- Ask for a clear explanation of each result.
- Discuss all options, including transfer, further testing, or new cycles.
For more information on PGT in Thailand, visit our PGT in Thailand page. You can also explore our guides and FAQ sections.
Frequently asked questions
What does a PGT-A result of 'euploid' mean?
A euploid result means the embryo has the expected number of chromosomes. It is often considered suitable for transfer, but it does not guarantee pregnancy or a healthy baby.
Can a mosaic embryo result in a healthy baby?
Yes, some mosaic embryos can develop into healthy babies, but the risk of miscarriage or genetic issues is higher than with euploid embryos. Your doctor can help you understand the specific risks based on the percentage and type of mosaicism.
Is PGT-A accurate?
PGT-A is a screening test with limitations. It samples only a few cells, which may not represent the entire embryo. It cannot detect all genetic conditions. Discuss the accuracy and limitations with your clinic.
What should I do if all my embryos are aneuploid?
If all embryos are aneuploid, your doctor may recommend considering another IVF cycle, using donor eggs or sperm, or exploring other options. The best next step depends on your individual situation.
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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.