At a glance
A practical guide to understanding euploid, aneuploid, and mosaic PGT results, with questions to ask your doctor in Thailand.
Understanding Your PGT Report
After embryo biopsy and genetic testing, you will receive a laboratory report listing each embryo’s chromosomal status. The three main categories are:
- Euploid: Normal number of chromosomes. These embryos have the highest chance of implantation and a healthy pregnancy.
- Aneuploid: Abnormal number of chromosomes. These embryos are unlikely to result in a live birth or may lead to miscarriage.
- Mosaic: A mix of normal and abnormal cells. The clinical significance varies; some mosaic embryos can still lead to healthy babies.
Your report may also include terms like “no result” (inconclusive) or “segmental abnormality” (partial chromosome change). Always review the report with your fertility specialist.
Key Questions to Ask Your Doctor
- What is the exact chromosomal status of each embryo (euploid, aneuploid, mosaic)?
- If mosaic, what is the percentage of abnormal cells and which chromosomes are involved?
- What is the recommended transfer order based on these results?
- Are there any additional tests (e.g., PGT-M for single gene disorders) that apply to my embryos?
- How reliable is the testing method used by this lab?
- What are the success rates for transferring euploid vs. mosaic embryos at your clinic?
Checklist for Discussing Results
- Bring a copy of your PGT report to the consultation.
- List any embryos with unclear or mosaic results for special discussion.
- Ask about the lab’s quality controls and accreditation.
- Inquire about the possibility of re-biopsy or retesting if results are inconclusive.
- Discuss the risks and benefits of transferring a mosaic embryo.
- Confirm the number of viable embryos available for transfer.
Next Steps After Interpretation
Once you understand your results, you can plan your embryo transfer cycle. Factors to consider include:
- Number of euploid embryos available
- Whether to consider preimplantation genetic testing for monogenic disorders (PGT-M) if indicated
- Timing of transfer (fresh vs. frozen)
- Need for additional fertility treatments or surrogacy arrangements
For more resources, visit our patient resources page or FAQ. To schedule a consultation, contact us.
Frequently asked questions
What does euploid mean in PGT results?
Euploid means the embryo has the correct number of chromosomes (46 in humans). These embryos are considered normal and have the best chance of implantation and healthy development.
Can a mosaic embryo lead to a healthy baby?
Yes, some mosaic embryos can result in healthy live births, but the risk of chromosomal abnormalities is higher. The decision to transfer a mosaic embryo should be made with your doctor based on the specific mosaic pattern and your personal circumstances.
How accurate are PGT results from Thai labs?
Accuracy depends on the laboratory's technology and protocols. Most Thai labs use next-generation sequencing (NGS) with high accuracy, but false positives and false negatives are possible. Discuss the lab's validation data with your clinic.
What should I do if my PGT report shows no euploid embryos?
If no euploid embryos are available, your doctor may discuss options such as using donor eggs, retesting mosaic embryos, or considering a new IVF cycle. Each case is unique, so seek personalized advice.
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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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