How Long Does PGT-A Biopsy Take and Does It Add Time to an IVF Cycle in Thailand?

If you are considering preimplantation genetic testing for aneuploidy (PGT-A) as part of an IVF cycle in Thailand, you likely want to know how the biopsy step fits into your overall timeline. The biopsy itself is a short procedure, but the full impact on your cycle depends on several factors, including embryo development, laboratory scheduling, and the testing method used. This guide explains the process and helps you plan your travel and expectations.

At a Glance: PGT-A Biopsy and IVF Timeline

• Biopsy procedure: A few minutes per embryo, performed by an embryologist.
• Timing: Usually occurs on day 5 or day 6 of embryo development (blastocyst stage).
• Result wait: Typically several days to a couple of weeks, depending on the testing method and lab.
• Cycle impact: The biopsy adds a laboratory step, but the main time consideration is the wait for results before a frozen embryo transfer.

What Is PGT-A Biopsy?

PGT-A is a genetic test that screens embryos for an abnormal number of chromosomes (aneuploidy). To perform the test, a small number of cells are removed from the outer layer of the embryo (trophectoderm), which will later become the placenta. This is called a biopsy. The embryo itself is not harmed; the cells are taken from the part that does not become the baby.

The biopsy is performed by an embryologist using a precise laser and a tiny pipette. It is a delicate procedure that requires skill and experience. The entire biopsy process for one embryo typically takes only a few minutes, but the laboratory must also prepare the cells for genetic analysis.

How the Biopsy Fits into the IVF Timeline

In a standard IVF cycle, eggs are retrieved, fertilized, and embryos are cultured in the laboratory for about five to six days until they reach the blastocyst stage. At this point, the embryologist can assess the embryo’s quality and, if PGT-A is planned, perform the biopsy.

The biopsy is usually done on day 5 or day 6 after fertilization. After the biopsy, the embryos are frozen (vitrified) while the genetic analysis takes place. This means that the embryo transfer is delayed until the results are available, which is typically in a subsequent menstrual cycle.

Therefore, the biopsy itself does not add significant time to the laboratory phase, but the wait for results does extend the overall timeline before a frozen embryo transfer can occur.

How Long Do PGT-A Results Take?

The time to receive PGT-A results varies depending on the testing method and the laboratory’s workflow. Some techniques, such as next-generation sequencing (NGS), may provide results in a few days, while others might take longer. In Thailand, many clinics send samples to specialized genetic laboratories, which may add shipping time.

Typically, you can expect to wait anywhere from a few days to two weeks for results. Your clinic will give you a more specific estimate based on their protocols and the laboratory they use. It is important to ask about this timeline during your consultation so you can plan your stay or travel arrangements.

Does PGT-A Add Time to the Overall IVF Cycle?

Yes, PGT-A adds time to the overall IVF cycle, but not because of the biopsy itself. The main time addition is the delay between embryo biopsy and transfer, as you must wait for the genetic results. In a fresh embryo transfer cycle, the transfer would typically occur on day 5 or 6 after egg retrieval. With PGT-A, the transfer is postponed to a later cycle, usually after the results are available and the embryo has been frozen.

This means that the total time from egg retrieval to embryo transfer can be extended by several weeks to a couple of months, depending on your clinic’s scheduling and your own menstrual cycle. However, many patients find that the benefit of knowing the chromosomal status of their embryos outweighs the additional wait.

Planning Your IVF Cycle in Thailand with PGT-A

If you are traveling to Thailand for IVF with PGT-A, it is essential to plan for the extended timeline. Here are some practical considerations:

• Duration of stay: You may need to stay in Thailand for the initial monitoring, egg retrieval, and embryo biopsy, which typically takes about two to three weeks. After that, you can return home while waiting for results, and then come back for the frozen embryo transfer.
• Communication: Ensure your clinic has a clear system for sharing results and scheduling your transfer, especially if you are not in the country.
• Flexibility: Be prepared for potential delays, such as laboratory turnaround times or the need to repeat a cycle if no embryos are suitable for biopsy.

Questions to Ask Your Clinic

To get a clear picture of your timeline, ask your clinic the following questions:

• On which day of embryo development do you typically perform the biopsy?
• How long does the biopsy procedure take for a single embryo?
• What is the expected turnaround time for PGT-A results?
• Do you send samples to an external laboratory? If so, how does that affect the timeline?
• How soon after receiving results can I schedule a frozen embryo transfer?
• What is your policy for communicating results and coordinating with international patients?

Next Steps: Your Checklist

• Consult with your fertility specialist to determine if PGT-A is appropriate for your situation.
• Ask for a detailed timeline that includes the biopsy and result wait.
• Plan your travel and accommodation with flexibility for potential delays.
• Discuss the costs of PGT-A, including biopsy, testing, and any additional shipping or storage fees.
• Clarify how your embryos will be frozen and stored while awaiting results.

Understanding the biopsy process and its impact on your IVF timeline can help you make informed decisions and reduce stress. While the wait for results can be anxious, it is a step that provides valuable information for your family-building journey.

Frequently asked questions

Is the PGT-A biopsy painful for the embryo?

The embryo does not have nerves, so it does not feel pain. The biopsy removes a few cells from the outer layer, and the embryo continues to develop normally in the laboratory.

Can PGT-A be done on day 3 embryos?

While it is possible to biopsy embryos at the cleavage stage (day 3), it is more common and generally considered safer to biopsy at the blastocyst stage (day 5 or 6) because more cells can be removed without affecting the embryo's viability.

Does PGT-A guarantee a successful pregnancy?

No, PGT-A does not guarantee pregnancy or a healthy baby. It screens for chromosomal abnormalities, but it cannot detect all genetic conditions or ensure implantation. Many other factors affect the outcome.

How long after PGT-A results can I have a frozen embryo transfer?

The timing depends on your clinic's protocols and your own menstrual cycle. Typically, you may need to wait for your next cycle after receiving results, but your clinic will provide specific instructions.

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.