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When you are considering PGT as part of IVF in Thailand, the quality of the laboratory behind your results matters as much as the treatment plan itself. PGT-A, PGT-M and PGT-SR all rely on precise embryology work, careful embryo biopsy and a genetics laboratory that follows recognised standards. Because no single international ranking of PGT laboratories exists, the most reliable approach is to ask direct questions about accreditation, biopsy technique, quality control and how results are reported. This guide explains what those terms mean, why they matter and what you can reasonably verify before you commit to a clinic.

At a glance

• PGT is a group of tests, not a guarantee of pregnancy or a healthy child.
• Laboratory quality affects the reliability of the information you receive, but it does not remove all uncertainty.
• Accreditation, biopsy method, quality control and reporting standards are the main areas to ask about.
• You can request to see certificates, sample reports and written policies before treatment.
• No clinic or laboratory can promise a specific outcome.

What PGT laboratory quality actually covers

PGT laboratory quality is not one single thing. It is a combination of how the embryology laboratory handles embryos, how the biopsy is performed, how the genetics laboratory processes and analyses the sample, and how the final report is written and explained to you.

For PGT-A, the laboratory looks at the number of chromosomes in the biopsied cells. For PGT-M, it looks for a specific inherited condition. For PGT-SR, it looks at structural chromosome rearrangements. Each of these tests has different technical requirements, and a laboratory that performs one well may not necessarily be set up for another. It is reasonable to ask which types of PGT a clinic offers and how it validates those tests.

Quality also includes the less visible parts: how embryos are cultured, how samples are labelled and tracked, how equipment is maintained, and how results are double-checked. These are the areas where accreditation and standard operating procedures become relevant.

Accreditation and certification: what to look for

Accreditation is an external review of a laboratory’s processes against a recognised standard. It is not a guarantee of a good outcome, but it does show that the laboratory has been assessed by an outside body and meets defined criteria for quality management.

In Thailand, genetics and embryology laboratories may hold different types of accreditation or certification. These can include international standards for medical laboratories, national laboratory accreditation schemes, or certification specific to assisted reproduction. Because accreditation status can change and different laboratories hold different credentials, you should ask the clinic directly for current documentation rather than relying on general claims.

Useful questions include:

• Which accreditation or certification does your genetics laboratory currently hold?
• Which accreditation or certification does your embryology laboratory currently hold?
• When was the last external assessment, and can I see the certificate?
• Are the PGT tests you offer included in the scope of that accreditation?
• Do you participate in external quality assessment or proficiency testing for PGT?

If a clinic cannot provide clear answers or documents, that is useful information. It does not automatically mean the laboratory is poor, but it means you cannot verify the claim.

Embryology laboratory standards in Thailand

The embryology laboratory is where embryos are cultured, monitored and prepared for biopsy. Its environment, equipment and staff expertise all influence the quality of the sample that reaches the genetics laboratory.

Key areas to ask about include:

• Air quality and culture conditions: Laboratories may use filtered air, controlled temperature and specific culture media. Ask how these are monitored and recorded.
• Embryo tracking: Each embryo and its biopsy sample should be traceable with a unique identifier from retrieval through to reporting. Ask how labelling and chain-of-custody are managed.
• Staffing: Ask who performs the biopsy, what training they have and how many procedures they perform. You do not need exact numbers, but you should understand whether the person doing the biopsy does it regularly.
• Equipment maintenance: Microscopes, lasers and incubators require regular servicing and calibration. Ask whether there is a documented maintenance schedule.
• Quality control: Ask how the laboratory monitors biopsy success rates, inconclusive results and repeat testing.

These questions are not about finding a perfect laboratory. They are about understanding whether the laboratory has systems in place to reduce avoidable errors and to detect problems when they occur.

Biopsy technique and its role in PGT accuracy

Embryo biopsy is the step where a small number of cells are removed from the embryo for testing. The technique used can affect the quality of the sample and, in turn, the reliability of the result.

Common approaches include removing cells from the trophectoderm (the outer layer of a blastocyst) or, less commonly now, from the cleavage stage. The timing of the biopsy, the tools used and the skill of the embryologist all matter. A poorly performed biopsy can yield insufficient or degraded DNA, leading to an inconclusive result or the need to repeat the test.

Questions to ask about biopsy technique:

• At what stage do you perform the biopsy, and why?
• How do you decide how many cells to remove?
• What is your rate of inconclusive or failed results, and how do you handle them?
• Do you use a laser, mechanical methods or a combination?
• How do you ensure the sample is not contaminated?

You are not expected to evaluate the technical details yourself. The goal is to see whether the clinic can explain its approach clearly and whether it monitors its own performance.

Reporting standards: what a good PGT report should include

The final report is what you and your clinician use to make decisions. A clear, standardised report should tell you what was tested, what was found and what the limitations are.

Ask to see a sample report (with patient details removed) before you start treatment. A useful report typically includes:

• The type of PGT performed (PGT-A, PGT-M or PGT-SR).
• The method used to analyse the sample.
• The result for each embryo, with a clear description of what the result means.
• Whether the result is conclusive, inconclusive or requires further testing.
• Any limitations of the test, including the possibility of false results or mosaicism.
• The name and credentials of the person who signed off the report.

If a report only says “normal” or “abnormal” without explaining the method or limitations, ask for more detail. You are entitled to understand what the result does and does not tell you.

How to compare laboratories and clinics without a ranking

There is no universally accepted ranking of PGT laboratories in Thailand. Any list you see online may be based on commercial relationships, patient volume or self-reported data rather than independent assessment. Instead of looking for a “best” laboratory, compare clinics on the criteria that matter to you.

You can use a simple comparison table like this one, filling it in with information you gather directly from each clinic:

Criteria	What to ask	Your notes
Accreditation	Which current certificates does the genetics and embryology lab hold?
Biopsy technique	What stage, what method, who performs it?
Quality control	How do you monitor inconclusive results and errors?
Reporting	Can I see a sample report? What does it include?
Communication	Who explains the results to me, and when?
Cost transparency	What is included in the quoted price, and what might cost extra?

This approach keeps the focus on verifiable information rather than marketing claims.

Limitations and uncertainty in PGT

PGT is a screening or diagnostic tool, not a guarantee. Even with a high-quality laboratory, several limitations remain:

• Mosaicism: An embryo can have a mix of cells with different chromosome patterns. A biopsy samples only a few cells, so the result may not represent the whole embryo.
• Inconclusive results: Some samples do not yield enough DNA or produce unclear signals. This can happen even in well-run laboratories.
• False results: No test is 100% accurate. Rarely, a result may be incorrect.
• What PGT does not test: PGT-A does not test for all genetic conditions, and PGT-M is designed for a specific condition. It does not guarantee a healthy child.
• Pregnancy outcomes: PGT cannot guarantee implantation, ongoing pregnancy or live birth. Other factors, including maternal age and uterine health, also play a role.

Understanding these limitations helps you have a more realistic conversation with your clinician about what PGT can and cannot do for your situation.

Questions to ask your clinic before choosing PGT in Thailand

Bring these questions to your consultations. You can also ask for written answers so you can compare clinics fairly.

1. Which PGT tests do you offer, and which laboratory performs the analysis?
2. What accreditation does that laboratory currently hold, and can I see the certificate?
3. Who performs the embryo biopsy, and what is their training and experience?
4. How do you monitor and report inconclusive results?
5. Can I see a sample PGT report?
6. How will my results be explained to me, and by whom?
7. What are the costs of PGT, including any additional fees for repeat testing or counselling?
8. What are the alternatives to PGT in my situation?
9. What are the legal and regulatory requirements for PGT in Thailand that apply to me?
10. What support is available if the results are unexpected or difficult?

Next steps: a short checklist

• Decide what you want to know about laboratory quality before you choose a clinic.
• Request accreditation documents and a sample report from each clinic you consider.
• Ask about biopsy technique and quality control in writing.
• Discuss the limitations of PGT with a qualified clinician, including what it cannot tell you.
• Confirm all costs, legal requirements and travel arrangements directly with the clinic and relevant authorities.
• Take your time. A clinic that welcomes your questions is often a better sign than one that avoids them.

For more information, you can explore our PGT in Thailand overview, compare clinics in our hospital directory, read related guides, or check our FAQ.

Frequently asked questions

Is PGT in Thailand regulated by the government?

Thailand has national regulations that apply to assisted reproduction and laboratory practice, but the specific requirements can change and may depend on the clinic and the type of PGT. Because rules and their enforcement can vary, you should ask your clinic directly about the current legal and regulatory framework that applies to your situation, and confirm any details with the relevant Thai authority if needed.

What accreditation should a PGT laboratory in Thailand have?

There is no single mandatory accreditation that all PGT laboratories in Thailand must hold. Some laboratories seek international standards for medical testing, while others may hold national accreditation or certification. The important step is to ask which specific accreditation the genetics and embryology laboratories currently hold, what the scope of that accreditation covers, and whether you can see the certificate. A clinic that can provide clear documentation is easier to assess.

Can I ask to see a sample PGT report before treatment?

Yes, you can ask to see a sample report with patient details removed. A clear report should state the type of PGT performed, the method used, the result for each embryo, whether the result is conclusive, and any limitations. If a clinic is unwilling to share a sample report, that is worth noting when you compare options.

Does a high-quality laboratory guarantee a successful pregnancy?

No. Laboratory quality can improve the reliability of the information you receive from PGT, but it cannot guarantee implantation, pregnancy or a healthy child. Many factors affect outcomes, including maternal age, embryo quality and uterine health. PGT itself has limitations, such as mosaicism and the possibility of inconclusive results. It is important to discuss these uncertainties with your clinician.

How do I compare PGT laboratories in Thailand if there is no official ranking?

Since there is no independent, universally accepted ranking of PGT laboratories in Thailand, focus on verifiable criteria: current accreditation, biopsy technique, quality control processes, reporting standards and how results are explained to you. Ask each clinic the same set of questions and request written answers where possible. This gives you a more reliable basis for comparison than any commercial list.

Continue your research

• Thailand hospital directory
• PGT in Thailand overview
• PGT and IVF guides

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.