At a glance
Recurrent miscarriage is a distinct reason to consider PGT, separate from age or failed IVF. This guide explains PGT-A, PGT-M and PGT-SR, what results can and cannot tell you, and how to discuss the option with a clinic in Thailand.
PGT, or preimplantation genetic testing, is a laboratory add-on to IVF that examines embryos for certain chromosomal or genetic features before transfer. For people with recurrent miscarriage, it is sometimes discussed as one possible way to reduce the chance of transferring an embryo with a chromosomal abnormality that could lead to another loss. It is not a guarantee, not a diagnosis of why losses happened, and not automatically recommended for everyone. Whether it is appropriate depends on your history, prior testing and what a fertility specialist concludes after review.
At a glance
- Recurrent miscarriage is a distinct indication for discussing PGT, separate from maternal age or repeated IVF failure.
- PGT-A counts chromosomes; PGT-M looks for a known inherited condition; PGT-SR looks at known structural chromosome rearrangements.
- PGT requires IVF, because embryos must be created and biopsied in a laboratory.
- A normal PGT result lowers but does not eliminate the chance of miscarriage.
- Guidelines do not treat PGT as a routine first-line answer for every case of recurrent loss.
- Ask the clinic how it defines recurrent miscarriage, what testing it recommends first, and how it would use PGT in your situation.
Why recurrent miscarriage is its own conversation
Recurrent pregnancy loss is usually defined as a certain number of consecutive miscarriages, though definitions vary between organizations and clinics. The causes are often mixed: chromosomal factors in the pregnancy, uterine anatomy, hormonal or metabolic conditions, blood-clotting disorders, infection, and sometimes no identifiable cause. Because the reasons differ from person to person, the evaluation matters as much as any single treatment.
PGT enters this conversation only after the broader picture is considered. If a couple has had losses and prior testing has identified a specific chromosomal issue, PGT may be more directly relevant. If no cause has been found, the role of PGT is less clear and should be discussed carefully rather than assumed.
What PGT-A, PGT-M and PGT-SR actually test
PGT is an umbrella term. The three main types answer different questions.
| Type | What it looks at | Typical context |
|---|---|---|
| PGT-A | Number of chromosomes in an embryo (aneuploidy screening) | Discussed when chromosomal abnormality in the pregnancy is a concern, including some recurrent loss situations |
| PGT-M | A specific gene variant known to run in the family | When one or both parents carry a known inherited condition |
| PGT-SR | Structural chromosome rearrangements such as translocations | When a parent has a known balanced rearrangement linked to losses |
PGT-A is the type most often raised in recurrent miscarriage discussions, because many early losses are associated with chromosomal abnormalities in the embryo. PGT-M and PGT-SR are more targeted and depend on prior genetic findings in the parents or family.
How PGT fits into an IVF cycle
- Consultation and review. The clinic reviews your loss history, prior tests and any genetic results.
- Ovarian stimulation and egg retrieval. Medication is used to mature multiple eggs, which are collected in a minor procedure.
- Fertilization and embryo development. Eggs and sperm are combined in the laboratory, and embryos are monitored as they grow.
- Biopsy. A few cells are removed from each embryo at a suitable stage.
- Genetic analysis. The biopsy sample is tested for the specific question being asked.
- Results and transfer planning. The clinic discusses which embryos are available and how results may inform transfer.
Each step has its own uncertainties. Not every cycle produces embryos suitable for biopsy or transfer, and testing itself can sometimes yield an unclear result.
What a PGT result can and cannot tell you
A PGT result is information about the cells that were sampled, not a complete picture of the embryo or a prediction of the future. A result reported as normal for the tested feature reduces the chance of a loss related to that feature, but it does not rule out miscarriage from other causes. A result reported as abnormal usually means that embryo would not be selected for transfer, though clinics handle specific findings differently.
Some results are inconclusive. In those cases, the clinic may discuss whether re-testing is possible, whether the embryo can still be considered, or whether the result should be set aside. These decisions are clinical and should be made with the treating team.
Evidence limits and why guidelines are cautious
Professional guidance generally does not present PGT as a routine, first-line solution for all recurrent miscarriage. The evidence is strongest in specific situations, such as when a known parental chromosomal rearrangement is present, and less clear when losses have no identified cause. Even where PGT is used, it does not replace a full evaluation for other contributing factors.
This is why an indication-based approach matters. The question is not simply whether PGT exists in Thailand, but whether it addresses the likely cause in your case. A clinic should be able to explain the reasoning, the alternatives, and what would change if you chose not to test.
Alternatives and complementary steps
Depending on your history, a clinic may discuss other evaluations or approaches alongside or instead of PGT. These can include:
- Testing of pregnancy tissue from a previous loss, where available
- Parental chromosome analysis (karyotyping)
- Assessment of uterine structure
- Screening for hormonal, metabolic or clotting conditions
- Expectant management or further spontaneous conception with monitoring
- Other IVF-related options, such as transferring without testing
No single option is right for everyone. The goal is to match the approach to the likely cause and to your priorities.
Questions to ask a clinic in Thailand
- How do you define recurrent miscarriage, and does my history meet that definition?
- What evaluations do you recommend before discussing PGT?
- Which type of PGT are you considering for me, and why?
- What proportion of embryos typically reach biopsy and transfer in your laboratory?
- How do you handle inconclusive or unusual results?
- What are the alternatives if I decide not to use PGT?
- What costs are involved, and which are not included in a quoted figure?
- What documents or preparations should international patients plan for?
Practical planning for international patients
Travel, visas, length of stay, medical records and payment arrangements vary by clinic and by individual situation. Because these details are time-sensitive and personal, confirm them directly with the clinic and, where relevant, with official Thai authorities. Ask for a written summary of the proposed plan, the tests involved, and the expected timeline so you can compare options clearly.
It also helps to request your prior medical records in advance, including any genetic test results, and to ask whether translation is needed. Planning around work, childcare and travel should account for the possibility that a cycle may not proceed exactly as hoped.
Next steps
- Gather your loss history and any prior test results.
- Ask a fertility specialist whether PGT is indicated in your case, and why.
- Clarify which type of PGT is being proposed and what it can and cannot show.
- Discuss alternatives and the option of not testing.
- Confirm practical details, costs and timelines in writing before committing.
For more background, see our PGT in Thailand overview, browse the guides, or check the FAQ.
Frequently asked questions
Does PGT prevent miscarriage?
No. PGT can reduce the chance of transferring an embryo with a specific chromosomal or genetic feature being tested, but it does not prevent miscarriage from other causes. Miscarriage can still occur for reasons PGT does not detect.
Is PGT always recommended after recurrent miscarriage?
No. Professional guidance generally does not treat PGT as a routine first-line option for every case of recurrent loss. Whether it is appropriate depends on your history, prior testing and the judgment of your treating clinician.
What is the difference between PGT-A, PGT-M and PGT-SR?
PGT-A looks at the number of chromosomes in an embryo. PGT-M looks for a specific inherited gene variant known in the family. PGT-SR looks at known structural chromosome rearrangements. The right type, if any, depends on what has been found in prior testing.
Can I have PGT without IVF?
No. PGT requires embryos created through IVF, because the test is performed on cells taken from an embryo in the laboratory. If you conceive without IVF, PGT is not applicable to that pregnancy.
What should I ask a clinic in Thailand about PGT?
Ask how they define recurrent miscarriage, what evaluations they recommend first, which type of PGT they propose and why, how they handle unclear results, what alternatives exist, and what costs and practical arrangements apply to international patients.
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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.
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