PGT vs No PGT in Thailand: How to Decide About Embryo Testing

PGT (preimplantation genetic testing) is an optional laboratory step added to IVF. It examines a small sample of cells from an embryo before transfer. Choosing PGT versus no PGT in Thailand is not a simple right-or-wrong decision. It depends on your medical history, the reason for IVF, what information you want, and how you weigh possible benefits against added cost, waiting time, and uncertainty. PGT can reduce the chance of transferring an embryo with a specific chromosomal or genetic finding, but it cannot guarantee a healthy pregnancy, a live birth, or a healthy child. Some patients choose testing; others reasonably choose untested transfer.

At a glance

• PGT-A screens embryos for extra or missing chromosomes (aneuploidy).
• PGT-M looks for a known single-gene condition that runs in a family.
• PGT-SR looks at chromosome structure, such as translocations.
• PGT is optional. It is not required for every IVF cycle and is not a guarantee of success.
• Testing adds laboratory work, cost, and usually a wait for results before transfer.
• No test can remove all uncertainty. Some embryos with normal results still do not implant, and some untested embryos do.

What PGT can and cannot tell you

PGT is a screening or diagnostic tool used during IVF. It does not treat infertility, improve embryo quality, or make an embryo more likely to implant. It provides information that you and your clinician can use when deciding which embryo or embryos to transfer.

What PGT may offer:

• Information about chromosome number (PGT-A) or a known gene change (PGT-M) or chromosome structure (PGT-SR).
• A way to consider avoiding transfer of embryos with certain findings, when alternatives exist.
• Possibly fewer transfers or a lower chance of miscarriage in some situations, depending on the reason for testing and the clinic’s protocols.

What PGT cannot do:

• Guarantee pregnancy, live birth, or a child without a health condition.
• Detect every possible genetic or chromosomal problem.
• Replace prenatal testing or newborn screening.
• Tell you whether an embryo will definitely implant.
• Make an untested embryo unsafe or a tested embryo safe in absolute terms.

Because PGT is a laboratory test, results can be affected by sample quality, the technology used, and the specific condition being tested. Your clinic should explain the limitations for your situation.

PGT-A, PGT-M, and PGT-SR: different questions, different decisions

These are not interchangeable tests. Each answers a different question, and each has its own reasons for being considered.

Test	What it looks at	Common reason it is discussed	Key limitation
PGT-A	Number of chromosomes in the embryo sample	Advanced maternal age, recurrent miscarriage, repeated implantation failure, or previous pregnancy with a chromosome condition	Does not test for single-gene disorders; may not detect all chromosome changes; some results are uncertain
PGT-M	A specific gene change known to run in the family	Family history of a single-gene condition, such as cystic fibrosis or spinal muscular atrophy	Requires a known gene change and often a custom test setup; does not screen for unrelated conditions
PGT-SR	Chromosome structure, such as a translocation	Known chromosome rearrangement in a parent, or repeated pregnancy loss linked to a structural issue	Does not detect all chromosome problems; interpretation depends on the specific rearrangement

If you are considering PGT, ask which test is being proposed and why. The answer should connect to your history, not to a general rule.

PGT versus no PGT: a decision-framing comparison

This comparison is about the choice to test or not to test. It is not a ranking of clinics or a promise of outcomes. Use it to organize your own questions.

Decision factor	Choosing PGT	Choosing no PGT
Information before transfer	You receive laboratory information about the embryo sample before deciding which embryo to transfer.	You transfer based on embryo appearance and development, without that genetic information.
Time to transfer	Usually requires waiting for laboratory results, which can extend the cycle or lead to a frozen transfer.	Transfer may be scheduled sooner, depending on your protocol and clinic schedule.
Cost	Adds laboratory and possibly storage or biopsy-related fees. Ask for a written breakdown.	Avoids PGT-specific laboratory fees, though IVF costs remain.
Embryo handling	Involves embryo biopsy and often freezing while results are pending.	Avoids biopsy and the associated laboratory steps.
Uncertainty	May reduce some uncertainty about specific chromosome or gene findings, but does not remove all uncertainty.	Leaves chromosome or gene status unknown before transfer; some uncertainty remains either way.
Emotional load	Waiting for results and interpreting them can be stressful; results may be inconclusive.	Avoids result-waiting, but may leave questions unanswered.
Best fit	Often discussed when there is a specific medical reason, such as a known familial condition or a history that raises concern.	Often reasonable when there is no specific indication, when few embryos are available, or when a patient prefers to avoid testing.

Neither column is automatically better. The right choice for you depends on your medical situation, your values, and what your clinic can support.

When PGT is more likely to be discussed

Clinics may raise PGT when certain factors are present. These are conversation starters, not eligibility rules.

• A known single-gene condition in the family, where PGT-M could be considered.
• A known chromosome rearrangement, where PGT-SR could be considered.
• Recurrent pregnancy loss or repeated implantation failure, where PGT-A may be discussed.
• Advanced maternal age, where the chance of chromosome differences in embryos is higher.
• A previous pregnancy or child with a chromosome condition.
• Preference for more information before transfer, after counseling about limits.

Even when these factors are present, PGT is a choice. Your clinician should explain the possible benefits and the possible downsides for your specific case.

When no PGT may be a reasonable path

Some patients decide against PGT. This can be a considered decision, not a failure to try hard enough.

• There is no specific genetic or chromosomal indication.
• Very few embryos are available, and the patient prefers to transfer without waiting or biopsy.
• The added cost or time is a significant burden.
• The patient prefers to avoid biopsy or freezing for personal reasons.
• The patient understands that PGT would not remove all uncertainty and chooses not to add the step.

If you choose no PGT, your clinic may still recommend other assessments or prenatal testing later. Ask what monitoring is appropriate for you.

Understanding PGT results

PGT results are usually reported in categories. Exact wording varies by laboratory and test.

• Normal or euploid: The sample did not show the specific finding being tested for. This does not guarantee implantation or a healthy baby.
• Abnormal or aneuploid: The sample showed a chromosome difference. Some findings are more serious than others, and some may be confined to the sample.
• Mosaic: The sample showed a mix of cells with different chromosome patterns. The meaning can be uncertain, and counseling is important.
• Inconclusive or no result: The test could not give a clear answer. This can happen for technical reasons.
• Carrier or affected (PGT-M): For single-gene conditions, results describe whether the embryo is predicted to be affected, a carrier, or unaffected, depending on the condition and test.

Ask your clinic who will explain the result, what it means for transfer decisions, and whether confirmatory testing during pregnancy is recommended.

Alternatives and complements to PGT

PGT is one option among several. Depending on your situation, your clinician may discuss:

• Transferring untested embryos, with or without additional embryo assessment.
• Prenatal screening or diagnostic testing during pregnancy, such as ultrasound, blood tests, chorionic villus sampling, or amniocentesis.
• Carrier screening for parents before or during IVF planning.
• Genetic counseling to understand risks and options.
• Donor gametes or embryos, where relevant and lawful.

These are not mutually exclusive. Some patients use PGT and later prenatal testing; others use neither and rely on standard prenatal care.

Practical questions to ask a clinic in Thailand

Use these questions to compare what different clinics offer and how they communicate. You can also review general guidance in our PGT in Thailand resource and guides.

1. Which PGT test are you recommending for my situation, and why?
2. What are the possible benefits and limitations for someone with my history?
3. What is the full cost of PGT, including biopsy, laboratory fees, freezing, storage, and any re-testing?
4. How long do results usually take, and how does that affect my transfer plan?
5. What happens if the result is inconclusive or mosaic?
6. Who will counsel me on results, and in what language?
7. What are my options if I choose not to test?
8. What prenatal testing do you recommend after transfer, whether or not I use PGT?
9. What are your laboratory’s accreditation and quality-control practices?
10. What documents, visas, or legal steps should I confirm before traveling?

Next-step checklist

• Clarify your main reason for considering IVF and whether a specific genetic risk is known.
• Ask your clinician whether PGT is medically indicated, optional, or not recommended for you.
• Request a written cost estimate that separates IVF, PGT, medication, storage, and travel.
• Ask how PGT would change your timeline and whether a frozen transfer would be needed.
• Consider genetic counseling if you have a family history or a known chromosome finding.
• Decide what level of uncertainty you are comfortable with before transfer.
• Confirm legal, visa, and documentation requirements with the clinic and relevant authorities.
• Review our FAQ for common patient questions.

The bottom line

PGT versus no PGT in Thailand is a personal medical decision, not a test of commitment. PGT can provide useful information in some situations, but it is not required for everyone and does not guarantee outcomes. No PGT is also a valid path when testing is not indicated, not affordable, or not aligned with your preferences. The best next step is a detailed conversation with a qualified clinician who can review your history, explain the limits of testing, and help you weigh the trade-offs.

Frequently asked questions

Is PGT required for IVF in Thailand?

No. PGT is an optional laboratory step. Whether it is recommended depends on your medical history, the reason for IVF, and your preferences. Some patients have a specific indication, such as a known familial genetic condition or a history of recurrent pregnancy loss. Others proceed without testing. Your clinic should explain whether PGT is medically indicated, optional, or not recommended for your situation.

Does PGT improve the chance of a successful pregnancy?

PGT does not guarantee pregnancy or a live birth, and it does not improve embryo quality. In some situations, testing may help avoid transferring an embryo with a specific chromosomal or genetic finding. However, tested embryos can still fail to implant, and untested embryos can result in healthy pregnancies. The effect on success depends on the reason for testing, the clinic's protocols, and individual factors.

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

PGT-A looks at chromosome number and is often discussed in cases of advanced maternal age, recurrent miscarriage, or repeated implantation failure. PGT-M looks for a specific single-gene condition known to run in a family. PGT-SR looks at chromosome structure, such as a translocation. Each test answers a different question and has different limitations. Your clinic can explain which, if any, is relevant for you.

Can I choose no PGT and still have a healthy pregnancy?

Yes. Many patients transfer untested embryos and have healthy pregnancies. Choosing no PGT is a reasonable option, especially when there is no specific genetic indication, when few embryos are available, or when the added cost or waiting time is a concern. Your clinic may still recommend standard prenatal screening or diagnostic testing during pregnancy.

What should I ask about the cost of PGT in Thailand?

Ask for a written breakdown that separates IVF costs from PGT-specific costs, such as embryo biopsy, laboratory testing, freezing, storage, and any re-testing. Costs vary by clinic and by the type of test. Because prices change and are clinic-specific, confirm current fees directly with the clinic rather than relying on general figures.

How long does PGT take, and will it delay my transfer?

PGT usually requires waiting for laboratory results, which can extend the cycle or lead to a frozen embryo transfer. The exact timeline depends on the laboratory, the test, and the clinic's schedule. Ask your clinic how long results typically take and how that affects your transfer plan.

Continue your research

• PGT in Thailand overview
• PGT and IVF guides
• Frequently asked questions

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.