How to Prepare for a PGT-M Cycle with a Known Genetic Condition

Understanding PGT-M

PGT-M (preimplantation genetic testing for monogenic disorders) is a technique used during IVF to identify embryos that do not carry a specific genetic condition. It is an option for couples or individuals who know they have a genetic mutation and want to reduce the chance of passing it on to their children. Preparing for a PGT-M cycle involves several steps, from genetic counseling to embryo biopsy. This guide outlines the process and provides questions to ask your clinic.

At a Glance: Key Steps

• Genetic counseling to understand your condition and testing options.
• Probe development to create a personalized test for your mutation.
• IVF cycle with embryo biopsy and genetic testing.
• Transfer of unaffected embryos, if available.

Step 1: Genetic Counseling

Before starting a PGT-M cycle, you will meet with a genetic counselor. This session helps you understand the inheritance pattern of your condition, the risks of passing it on, and the accuracy and limitations of PGT-M. The counselor will also review your medical and family history to confirm that PGT-M is appropriate for your situation.

What to Discuss with Your Genetic Counselor

• Your specific genetic mutation and its inheritance pattern.
• The risk of passing the condition to a child.
• How PGT-M works and its success rates (ask for clinic-specific data).
• Alternative options, such as prenatal testing or using donor gametes.
• Emotional and ethical considerations.

Step 2: Probe Development

PGT-M requires a personalized test, called a probe, that detects your specific mutation. To develop this probe, you and often your partner or a family member will provide blood samples. The laboratory uses these samples to design a test that can identify embryos carrying the mutation. This process takes time, so it is important to start it well before your IVF cycle.

Questions to Ask About Probe Development

• How long does probe development take?
• What samples are needed from me and my partner or family members?
• What is the cost of probe development, and is it included in the PGT-M package?
• What happens if the probe cannot be developed?

Step 3: IVF Cycle with Biopsy

Once the probe is ready, you will undergo an IVF cycle. This involves ovarian stimulation, egg retrieval, fertilization, and embryo culture. On day 5 or 6, a few cells are removed from each embryo (biopsy) and sent to the genetic laboratory for testing. Only embryos that are unaffected by the condition are considered for transfer.

Understanding the IVF Process

• Ovarian stimulation: You will take medications to produce multiple eggs.
• Egg retrieval: A minor procedure to collect eggs.
• Fertilization: Eggs are fertilized with sperm in the lab.
• Embryo culture: Embryos grow for several days.
• Biopsy: Cells are removed for genetic testing.
• Genetic testing: The probe is used to analyze the embryos.
• Transfer: An unaffected embryo is placed in the uterus.

Step 4: Embryo Transfer and Follow-Up

After testing, your doctor will discuss the results with you. If you have unaffected embryos, you can plan a frozen embryo transfer. If not, you may need to consider other options. After transfer, you will have a pregnancy test and follow-up care.

Checklist of Questions to Ask Your Clinic

• What is your experience with PGT-M for my specific condition?
• What is the timeline from initial consultation to embryo transfer?
• What are the costs for genetic counseling, probe development, IVF, biopsy, and testing?
• How many embryos typically reach the biopsy stage?
• What is the accuracy of PGT-M for my mutation?
• What are the risks of the biopsy procedure?
• How are embryos with uncertain results handled?
• What support services are available?

Next Steps

Preparing for a PGT-M cycle requires careful planning and coordination. Start by scheduling a genetic counseling session and discussing probe development with your clinic. Use the questions above to guide your conversations. For more information about PGT in Thailand, visit our PGT in Thailand page. You can also explore our patient resources or FAQ for additional guidance. When you are ready, contact us to discuss your options.

Frequently asked questions

How long does it take to prepare for a PGT-M cycle?

Preparation time varies. Genetic counseling and probe development can take several weeks to months, depending on the laboratory and your specific mutation. Your clinic can provide a timeline based on your situation.

What is the success rate of PGT-M?

Success rates depend on many factors, including the laboratory's experience, the number of embryos produced, and the accuracy of the probe. Ask your clinic for their specific success rates and what they mean for your case.

Are there risks to the embryo from biopsy?

Embryo biopsy is generally considered safe, but there may be a small risk of damage to the embryo. Your clinic will explain the risks and how they minimize them.

Can PGT-M be used for any genetic condition?

PGT-M can be used for many single-gene disorders, but not all. The feasibility depends on the specific mutation and the ability to develop a reliable probe. Your genetic counselor can advise you.

Continue your research

• PGT in Thailand overview
• Patient resources
• Prepare a private case review

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.