At a glance
A cautious guide to when PGT may be considered in severe male factor infertility, what it can and cannot tell you, and the questions to ask a clinic in Thailand.
PGT (preimplantation genetic testing) is a laboratory add-on to IVF that examines embryos for specific chromosomal or genetic issues before transfer. In severe male factor infertility, PGT is not a routine fix and does not correct sperm problems. It may be considered only when there is a defined genetic or chromosomal indication, or when a clinic recommends it after reviewing the couple’s history. PGT cannot guarantee a pregnancy, a live birth, or a healthy child, and it is not required for every couple with severe male factor infertility.
At a glance
- Severe male factor infertility usually points first to ICSI (intracytoplasmic sperm injection), not PGT.
- PGT-A, PGT-M, and PGT-SR answer different questions; they are not interchangeable.
- PGT does not repair sperm DNA fragmentation or improve sperm quality.
- Whether PGT is appropriate depends on your history, prior results, and genetic findings.
- Ask the clinic to explain the indication, the limits, and what happens if results are inconclusive.
What PGT is and what it is not
PGT involves removing a small number of cells from an embryo, usually at the blastocyst stage, and testing those cells in a laboratory. The goal is to identify embryos with certain chromosomal or genetic findings so that transfer decisions can be made with more information.
PGT is not a treatment for male infertility. It does not change sperm, improve fertilisation, or repair DNA damage in sperm. It also does not guarantee that a transferred embryo will implant, that a pregnancy will continue, or that a child will be free of all health conditions. Some conditions cannot be detected by the tests available, and some results may be uncertain or require confirmation.
Why severe male factor infertility is different
Severe male factor infertility can include very low sperm count, very low motility, a high proportion of abnormal sperm forms, or sperm that must be retrieved surgically. In these situations, ICSI is often used to inject a single sperm directly into an egg. ICSI addresses fertilisation, while PGT addresses embryo testing. They are separate steps with separate purposes.
Some men with severe male factor infertility also have a chromosomal finding, such as a translocation, or a known genetic cause. In those cases, PGT may be discussed because the risk of passing on a specific condition could be higher. However, the presence of severe male factor infertility alone does not automatically mean PGT is indicated.
PGT-A, PGT-M, and PGT-SR: different questions
| Type | What it looks at | Typical situation | Important limits |
|---|---|---|---|
| PGT-A | Number of chromosomes in embryo cells | Sometimes discussed with advanced maternal age, recurrent implantation failure, or recurrent pregnancy loss | Does not diagnose all genetic conditions; may give uncertain results; does not guarantee pregnancy |
| PGT-M | A specific known gene variant | When one or both parents are known carriers of a specific condition | Requires a known variant and a validated test; cannot screen for unknown conditions |
| PGT-SR | Chromosomal rearrangements such as translocations | When a parent has a known structural chromosome rearrangement | Requires a confirmed diagnosis in a parent; does not cover all possible imbalances |
In severe male factor infertility, PGT-SR may be relevant if the man has a known chromosomal rearrangement. PGT-M may be relevant if there is a known inherited condition. PGT-A is a broader chromosome check and is not specific to male factor infertility. The choice of test should follow a clear clinical question, not a general desire to test.
What PGT can and cannot tell you
PGT can provide information about the tested cells. It cannot tell you whether an embryo will implant, whether a pregnancy will be healthy, or what a child’s future health will be. Testing is not perfect: some embryos may be misclassified, and some results may be inconclusive. In some cases, a clinic may recommend confirmatory testing during pregnancy.
PGT also does not replace a full genetic evaluation. If a specific condition runs in the family, a genetic counsellor or specialist can help clarify whether testing is possible and what it would involve.
Sperm DNA fragmentation and PGT
Sperm DNA fragmentation is a separate measure of sperm quality. It is not the same as PGT, and PGT does not directly test for sperm DNA fragmentation. Some clinics may discuss sperm DNA fragmentation testing as part of a male factor evaluation, but its role in treatment planning is debated and should be interpreted with caution. If you see claims that PGT can overcome sperm DNA fragmentation, treat them sceptically and ask for the reasoning.
ICSI with PGT in Bangkok: how the steps fit together
In a typical IVF cycle with ICSI, eggs are collected, sperm is prepared, and a single sperm is injected into each mature egg. Embryos that develop are monitored. If PGT is planned, cells are removed from suitable embryos and tested. Embryos may be frozen while results are pending. Transfer is then planned based on the results and the clinic’s protocol.
Not every embryo will be suitable for testing, and not every cycle will produce embryos for transfer. The number of embryos available, their stage, and the laboratory’s criteria all affect whether testing can be done. Ask the clinic to explain what happens if no embryo is suitable for testing or if results are inconclusive.
Questions to ask a clinic in Thailand
- What is the specific indication for PGT in our case?
- Which type of PGT are you recommending, and why?
- What are the limits of the test you are proposing?
- What proportion of embryos typically remain available for transfer after testing in similar cases?
- What happens if results are inconclusive or if no embryo is suitable for transfer?
- Are there alternative approaches if we decide not to do PGT?
- What are the costs, including any separate charges for testing, freezing, and storage?
- What documents or legal requirements apply to us as international patients?
- Who will explain the results to us, and will genetic counselling be available?
Alternatives and limits of PGT
For some couples with severe male factor infertility, the main decision is not about PGT but about ICSI, sperm retrieval, or donor sperm. Others may consider not testing embryos and transferring based on standard embryo assessment. There is no single right path. The choice depends on the medical facts, your values, and what the clinic can offer.
PGT adds cost, laboratory steps, and waiting time. It may reduce the number of embryos available for transfer. It does not improve embryo quality. For some couples, the information gained is valuable; for others, it may not change the plan. A candid discussion with a fertility specialist and, where relevant, a genetic counsellor can help you weigh the trade-offs.
Next steps
- Gather your medical records, including semen analysis results, any genetic testing, and prior IVF cycles.
- Ask for a clear explanation of whether PGT is indicated and what it would change.
- Confirm the type of PGT, the laboratory arrangements, and the costs in writing.
- Ask about genetic counselling before and after testing.
- Check the clinic’s policy on inconclusive results, embryo freezing, and transfer planning.
- Review the legal and documentation requirements for international patients with the clinic and relevant authorities.
For more background, see our guides on PGT in Thailand, patient guides, and frequently asked questions.
Frequently asked questions
Does severe male factor infertility always mean PGT is needed?
No. Severe male factor infertility often leads to ICSI, but PGT is not automatically required. PGT may be considered when there is a specific genetic or chromosomal indication, such as a known translocation or inherited condition. The decision should be based on your history and a clear clinical question.
Can PGT improve sperm DNA fragmentation?
No. PGT tests embryos, not sperm. It does not repair or improve sperm DNA fragmentation. Sperm DNA fragmentation is a separate measure, and its role in treatment planning should be discussed with your clinician.
What is the difference between PGT-A, PGT-M, and PGT-SR?
PGT-A looks at the number of chromosomes in embryo cells. PGT-M looks for a specific known gene variant. PGT-SR looks for chromosomal rearrangements such as translocations. Each answers a different question and has different limits.
Does PGT guarantee a healthy baby?
No. PGT can provide information about the tested cells, but it cannot guarantee a pregnancy, a live birth, or a child free of all health conditions. Some conditions cannot be detected, and results can be uncertain.
What should we ask a clinic in Thailand about PGT?
Ask about the specific indication for PGT, which type is recommended, the limits of the test, what happens if results are inconclusive, the costs, and the legal or documentation requirements for international patients. Also ask whether genetic counselling is available.
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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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