Receiving your PGT-A results can feel overwhelming. This guide explains the main result categories—euploid, aneuploid, and mosaic—in plain English, and offers practical questions to ask your clinic in Thailand. Always discuss your specific results with a qualified medical professional who knows your full history.
At a glance: PGT-A result categories
- Euploid: expected number of chromosomes, often considered “normal.”
- Aneuploid: missing or extra chromosomes, often considered “abnormal.”
- Mosaic: a mix of cells with different chromosome numbers.
- No result: the test could not provide a clear answer.
What is PGT-A?
Preimplantation Genetic Testing for Aneuploidy (PGT-A) is a test that checks embryos for an abnormal number of chromosomes. It is performed on embryos created through IVF before a potential transfer. The test is optional and not a guarantee of pregnancy or a healthy baby. In Thailand, PGT-A is offered by many fertility clinics, but the way results are reported can vary.
Understanding your PGT-A report
Your report will typically list each embryo tested and a result for each. Here are the common terms you may see:
Euploid
An embryo with the expected number of chromosomes (46 in humans) is called euploid. This is often described as “normal.” Euploid embryos have the highest chance of implanting and developing, but they are not a guarantee of a live birth.
Aneuploid
An embryo with missing or extra chromosomes is aneuploid. For example, trisomy 21 (three copies of chromosome 21) is a type of aneuploidy. Most aneuploid embryos will not implant or will miscarry, but some can lead to a child with a genetic condition. Transferring an aneuploid embryo is generally not recommended, but your doctor will discuss your specific situation.
Mosaic
A mosaic embryo has a mixture of cells: some with the expected chromosome number and some with an abnormal number. Mosaic results are reported as a percentage, such as “20% mosaic.” The implications are not fully understood, and outcomes can vary. Some mosaic embryos may develop normally, while others may not. Your clinic can explain the specific level of mosaicism and what it might mean for your case.
No result
Sometimes the test fails to produce a clear result, for example, if the biopsy sample was insufficient or the DNA amplification failed. In such cases, you may have the option to retest or to proceed without PGT-A information.
How to interpret your results with your clinic
Your PGT-A report is a piece of the puzzle. Your doctor will consider your age, embryo quality, and medical history. Here are steps to help you understand your results:
- Ask for a clear explanation: Request that your doctor or genetic counselor explain each result in plain language.
- Discuss transfer options: Ask which embryos are suitable for transfer and why.
- Understand the limitations: PGT-A does not detect all genetic conditions or guarantee a healthy baby.
- Consider additional testing: In some cases, PGT-M or PGT-SR may be recommended for specific genetic disorders.
Questions to ask your Thai clinic
- What does “mosaic” mean in my report, and what percentage is considered high?
- Are there any embryos that you would not recommend transferring?
- What is the accuracy of this PGT-A test?
- If I have no euploid embryos, what are my options?
- Do you offer genetic counseling to help me understand the results?
Next steps after receiving results
Once you have your results, you may need to decide whether to transfer an embryo, consider further testing, or explore other options. Take your time and ask questions. Your clinic’s fertility specialist and genetic counselor are there to support you.
Related resources
For more information on PGT in Thailand, see our PGT in Thailand guide. You can also browse our guides for other fertility topics, or visit our FAQ for common questions.
Frequently asked questions
What does a 'mosaic' PGT-A result mean?
A mosaic result means the embryo has a mix of cells with different chromosome numbers. The percentage indicates the proportion of abnormal cells. The implications are not fully understood, and outcomes can vary. Your clinic can explain the specific level and what it might mean for your case.
Can a PGT-A abnormal embryo result in a healthy baby?
In rare cases, an embryo classified as aneuploid may still lead to a healthy baby, but this is uncommon. Most aneuploid embryos fail to implant or miscarry. Your doctor will discuss the risks and options based on your specific situation.
Is PGT-A testing mandatory in Thailand?
No, PGT-A is optional. It is offered to help select embryos with the expected number of chromosomes, but it is not required for all IVF patients. Your clinic can advise whether it may be beneficial for you.
How long does it take to get PGT-A results in Thailand?
The time can vary depending on the laboratory and the testing method. Typically, results may take several days to a few weeks. Your clinic will provide a specific timeline.
Continue your research
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.