Typical Timeline for a Frozen Embryo Transfer (FET) Cycle in Thailand

If you are planning a frozen embryo transfer (FET) in Thailand, understanding the typical timeline can help you coordinate travel, work, and personal commitments. While every patient’s cycle is individualized, most FET cycles follow a predictable sequence of steps. This guide provides a general overview of the timeline from cycle start to embryo transfer, including monitoring appointments. Please note that exact schedules vary by clinic and individual medical protocol—always confirm details directly with your treating clinic.

At a Glance: FET Timeline Overview

• Preparation phase: 2–4 weeks before cycle start (medication, baseline tests)
• Cycle monitoring: Approximately 2–3 weeks of appointments every 1–3 days
• Embryo transfer: A brief procedure on a scheduled day
• Post-transfer: 9–12 days until pregnancy test

Step 1: Pre-Cycle Preparation (2–4 Weeks Before)

Before starting an FET cycle, your clinic will typically require a consultation and baseline assessments. This may include blood work, an ultrasound, and a review of your medical history. If you are using hormone replacement therapy (HRT) to prepare the uterine lining, you may begin medications such as estrogen several weeks before the actual cycle start. Some clinics also recommend a trial transfer or endometrial scratch. Confirm with your clinic what preparation is needed and how far in advance you should arrive in Thailand.

Step 2: Cycle Start and Lining Preparation (Days 1–14)

The FET cycle officially begins on day 1 of your menstrual period (or a programmed start with medication). From day 1, you will take estrogen (oral, patch, or injection) to thicken the uterine lining. Monitoring appointments (blood tests and ultrasound) occur every 2–4 days to check hormone levels and lining thickness. The goal is a lining of adequate thickness (typically 7–10 mm) and a trilaminar pattern. This phase usually lasts 10–14 days.

Step 3: Progesterone Start and Transfer Timing (Days 15–20)

Once the lining is ready, you will begin progesterone supplementation (injection, vaginal suppository, or gel) to prepare the endometrium for implantation. The timing of progesterone start determines the transfer date. For a day-5 blastocyst, transfer is typically scheduled 5–6 days after starting progesterone. Your clinic will give you an exact transfer date. Monitoring continues but may be less frequent.

Step 4: Embryo Transfer Day (Day of Transfer)

The transfer itself is a quick procedure (about 10–15 minutes) that does not require anesthesia. You will be asked to come with a full bladder. After the transfer, you may rest briefly before resuming normal activities. Your clinic will provide specific instructions regarding activity, medications, and follow-up.

Step 5: Post-Transfer and Pregnancy Test (Days 9–12 After Transfer)

After the transfer, you will continue progesterone support. A blood pregnancy test (beta-hCG) is typically performed 9–12 days after transfer. If positive, you may continue medications and schedule an ultrasound in 2–3 weeks. If negative, medications are stopped and you can discuss next steps with your clinic.

Factors That Can Affect the Timeline

• Natural vs. programmed cycle: In a natural FET cycle, ovulation timing replaces some medications, which may alter the schedule.
• Embryo stage: Day-3 embryos have a different transfer window than day-5 blastocysts.
• Lining response: Some patients require additional time or medication adjustments if the lining is slow to develop.
• Clinic protocols: Each clinic may have slightly different monitoring schedules and medication regimens.

Questions to Ask Your Clinic

• What is the estimated timeline from cycle start to transfer for my specific protocol?
• How many monitoring appointments will I need, and on which days?
• When should I arrive in Thailand relative to my cycle start?
• What medications will I need, and can I obtain them locally or bring from home?
• What is the clinic’s policy on travel after transfer?

Next Steps

• Consult with your chosen clinic to receive a personalized calendar.
• Arrange travel and accommodation based on the estimated timeline, allowing flexibility for unexpected changes.
• Prepare necessary medications and confirm any prescriptions or import requirements.
• Plan for post-transfer rest and follow-up testing.

For more information on IVF and treatment processes in Thailand, see our guides on IVF in Thailand and the treatment process. International patients can find additional planning resources on our international patients page.

Frequently asked questions

How long do I need to stay in Thailand for a frozen embryo transfer?

The minimum stay is typically around 3–4 weeks from cycle start to transfer, but this can vary. Some patients arrive a few days before the cycle start and leave shortly after transfer, while others stay until the pregnancy test. Confirm with your clinic the recommended duration based on your protocol.

Can I travel during the FET cycle?

Travel is generally not recommended during the monitoring phase because appointments are frequent (every 1–3 days). After transfer, light travel may be allowed, but long flights or strenuous activity are usually discouraged. Always follow your clinic’s advice.

What if my lining is not thick enough on the expected day?

If the lining does not reach the desired thickness, your clinic may extend the estrogen phase or adjust medications. This can delay the transfer by a few days to a week. Your clinic will monitor and advise you on the best course.

Do I need to take time off work after the transfer?

Most clinics recommend resting for the remainder of the transfer day, but you can usually resume normal activities the next day. Strenuous exercise and heavy lifting are often discouraged until the pregnancy test. Check with your clinic for specific guidelines.

Is the timeline different for a natural FET cycle?

Yes, in a natural cycle, the transfer is timed to ovulation, which may require more frequent monitoring (e.g., daily blood tests and ultrasounds) around ovulation. The overall duration is similar, but the schedule is less predictable. Discuss with your clinic which protocol suits you best.

Continue your research

• IVF in Thailand guide
• Treatment journey
• International patient guide

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.