PGT-M Testing in Thailand: Eligibility Questions for International Patients

PGT-M (preimplantation genetic testing for monogenic conditions) is a targeted test. It is usually considered when a specific inherited condition and a specific genetic change (mutation) have already been identified in the family. For international patients, eligibility is not a single yes-or-no answer. It depends on your genetic history, the laboratory’s ability to build a reliable test, and the clinic’s own policies. This guide explains the questions to ask and the steps to plan, without giving legal or medical conclusions.

At a glance

• PGT-M is not a general screening test; it is designed around a known familial mutation.
• Most pathways begin with genetic counselling and a prior genetic workup, often before you contact a clinic in Thailand.
• Eligibility is assessed case by case and clinic policies may vary.
• You will likely need to confirm document, cost, travel and legal categories directly with the treating clinic or relevant authority.
• PGT-M does not guarantee a pregnancy, a live birth or a child without the condition.

What PGT-M is and what it is not

PGT-M looks for a known, specific genetic change in embryos created through IVF. It is different from PGT-A, which looks at chromosome number, and from PGT-SR, which is used when there is a known structural chromosome rearrangement. Because PGT-M is targeted, it usually requires that the exact mutation has already been found in your family through genetic testing.

PGT-M is not a guarantee. It cannot ensure a pregnancy, a live birth or a child unaffected by the condition. It also cannot detect every possible genetic or health issue. Results can be affected by laboratory factors, and some embryos may give an unclear result. Your clinic should explain the limits in your specific situation.

Why a known familial mutation usually matters

To design a PGT-M test, a laboratory generally needs to know what it is looking for. That usually means a confirmed mutation in a family member, or in you or your partner. Without that information, a laboratory may not be able to build a reliable test. In some situations, a clinic may discuss additional workup, but this is a clinical decision and not something to assume.

If no mutation has been identified, the first step is usually genetic counselling and testing in your home country or with a genetics service. This is often called a prior genetic workup. It can take time, and it may need to be completed before a PGT-M referral can move forward.

Common eligibility questions international patients ask

Do I need a referral from a geneticist or doctor?

Many clinics prefer or require a referral from a clinical geneticist, genetic counsellor or specialist who has already assessed the family condition. This helps the clinic understand the mutation and the inheritance pattern. Requirements vary, so ask the clinic what referral information they need and in what format.

Can I start PGT-M if I have not had genetic testing?

Usually not, because PGT-M is built around a known mutation. If you have not had genetic testing, a clinic may ask you to complete that first. In some cases, a clinic may discuss whether testing is possible, but this is a clinical and laboratory decision. Do not assume it can be arranged after you arrive.

Does the type of inherited condition affect eligibility?

Different conditions and different mutations can affect how a test is designed. Some may be more straightforward than others. The laboratory needs to be able to build a reliable test for your specific mutation. This is a technical assessment, and it is one reason why eligibility is case by case.

Can both partners be carriers?

If both partners carry a mutation for the same condition, the inheritance pattern and the testing strategy may be different. This is a clinical question for a genetic counsellor or specialist. The clinic will need to review both partners’ genetic information.

Is PGT-M available for every inherited condition?

No. Availability depends on the laboratory’s ability to design a test for the specific mutation and on the clinic’s policies. Some conditions may be more difficult to test for than others. Ask the clinic whether they have experience with your specific condition and mutation.

Do clinic policies vary?

Yes. Clinics may have different requirements for referral, prior workup, counselling, documentation and eligibility. Some may accept international patients directly; others may require a local or remote genetics consultation first. Always confirm the clinic’s own policy.

How the referral and eligibility process often works

The exact steps depend on your situation and the clinic. A typical sequence may look like this:

1. Genetic counselling and testing in your home country. A clinical geneticist or genetic counsellor confirms the condition and the specific mutation.
2. Gather your genetic documentation. This may include test reports, family history and a summary letter from your genetics team.
3. Contact a clinic in Thailand. Ask whether they offer PGT-M for your condition and what they need to assess eligibility.
4. Laboratory review. The clinic’s laboratory reviews whether a reliable test can be designed for your mutation.
5. Clinical review and counselling. A specialist may discuss the inheritance pattern, the limits of PGT-M and alternatives.
6. Decision and planning. If the pathway is possible, the clinic explains the IVF process, timelines and what to confirm before travel.

This is a general outline, not a promise of eligibility. Some steps may be combined, repeated or not possible in your case.

Questions to ask a clinic about PGT-M eligibility

• Do you offer PGT-M for my specific condition and mutation?
• What prior genetic workup do you require, and in what format?
• Do you need a referral from a geneticist or genetic counsellor?
• How do you assess whether a laboratory can design a test for my mutation?
• What counselling do you provide before and after testing?
• What are the limits of PGT-M in my situation?
• What alternatives should I consider?
• What documents, costs and travel arrangements should I confirm before planning?
• What is your policy if the test cannot be designed or gives an unclear result?

Practical planning categories to confirm

Because requirements can change and vary by clinic, treat the following as categories to confirm directly rather than fixed rules:

• Documents: genetic test reports, referral letters, identification and any clinic-specific forms.
• Costs: consultation, laboratory test design, IVF cycle, PGT-M testing, medication, travel and accommodation. Ask for a written breakdown.
• Travel and timing: how long you may need to stay, how many visits are involved and whether monitoring can be done locally.
• Legal and regulatory: what is permitted in Thailand and in your home country, and what you need to confirm with the relevant authority.
• Follow-up: how results are communicated, what happens to stored embryos and what support is available.

Alternatives and limits to discuss

PGT-M is one option among several. Depending on your situation, alternatives may include prenatal testing, accepting the natural chance of inheritance, using donor gametes, or choosing not to pursue testing. Each option has different implications, and none is right for everyone. A genetic counsellor or specialist can help you weigh them.

PGT-M also has limits. It may not be possible for every mutation. It may not detect all genetic issues. It does not guarantee a healthy child. Some embryos may be affected, unaffected or give an unclear result. Your clinic should explain what an unclear result could mean for you.

Next steps

1. Speak with a genetic counsellor or clinical geneticist about your family condition and whether PGT-M is relevant.
2. Collect your genetic test reports and a summary letter.
3. Contact clinics in Thailand to ask about PGT-M eligibility for your specific mutation.
4. Ask for written information about documents, costs, timelines and limits.
5. Confirm legal and travel requirements with the relevant authority and the clinic.
6. Take time to consider alternatives and make a decision that fits your values.

For more general information, see our international patients page, our PGT in Thailand guide, the guides section and the FAQ.

Frequently asked questions

Can I get PGT-M in Thailand without a known mutation in my family?

PGT-M is usually designed around a known, specific mutation. Without that information, a laboratory may not be able to build a reliable test. Some clinics may discuss additional workup, but this is a clinical decision. It is best to speak with a genetic counsellor or specialist first.

Do I need a referral from a geneticist to start PGT-M in Thailand?

Many clinics prefer or require a referral from a clinical geneticist, genetic counsellor or specialist. Requirements vary by clinic. Ask the clinic what referral information they need and in what format before you plan.

Is PGT-M available for all inherited conditions?

No. Availability depends on whether a laboratory can design a reliable test for your specific mutation and on the clinic's policies. Some conditions may be more difficult to test for than others. Confirm with the clinic whether they have experience with your condition.

Does PGT-M guarantee a healthy baby?

No. PGT-M cannot guarantee a pregnancy, a live birth or a child without the condition. It also cannot detect every possible genetic or health issue. Your clinic should explain the limits and what results may mean in your situation.

What should I confirm with a clinic before travelling to Thailand for PGT-M?

Confirm the clinic's eligibility policy, required documents, costs, expected timeline, travel arrangements and legal considerations. Ask for a written breakdown and clarify what happens if the test cannot be designed or gives an unclear result.

Continue your research

• International patient guide
• 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.