At a glance
Understand the main differences between fresh and frozen embryo transfers in Thailand, including timing, success considerations, costs, and medical indications.
What is the difference between a fresh and frozen embryo transfer in Thailand?
In IVF, a fresh embryo transfer involves placing an embryo into the uterus a few days after egg retrieval, without freezing. A frozen embryo transfer (FET) uses embryos that have been cryopreserved and thawed, then transferred in a later menstrual cycle. The choice between them depends on your medical situation, cycle response, and personal preferences. Below we explain the key differences in timing, success considerations, costs, and medical indications to help you discuss options with your clinic.
At a glance
- Timing: Fresh transfer occurs 3–5 days after egg retrieval; frozen transfer is scheduled weeks to months later.
- Success considerations: Frozen transfers may have slightly higher implantation rates in some studies, but success depends on embryo quality and uterine receptivity.
- Costs: Frozen transfers add storage and thawing fees, but may reduce cycle costs if fresh transfer is not possible.
- Medical indications: Fresh transfer is preferred when uterine lining and hormone levels are optimal; frozen transfer is used for OHSS risk, genetic testing, or cycle synchronization.
Timing and cycle planning
Fresh transfer is performed in the same cycle as egg retrieval, typically on day 3 (cleavage stage) or day 5 (blastocyst). Frozen transfer is scheduled in a subsequent natural or medicated cycle, allowing time for embryo testing (PGT), uterine preparation, or recovery from ovarian stimulation. In Thailand, many clinics offer both options, and the timeline can be discussed during your initial consultation.
Success considerations
Success rates for fresh vs frozen transfers vary by clinic, patient age, embryo quality, and uterine factors. Some research suggests that frozen transfers may have slightly higher implantation and live birth rates, especially when the uterine lining is better prepared. However, fresh transfers remain effective for many patients. It is important to ask your clinic for their own success data specific to your age and diagnosis, as general statistics may not apply.
Costs and financial planning
Fresh transfer costs are typically included in the IVF cycle fee. Frozen transfer involves additional charges for embryo freezing, storage (monthly or yearly), and thawing. In Thailand, these fees vary by clinic. Confirm with your clinic the total cost of a frozen transfer cycle, including medication and monitoring, as it may be lower than a fresh cycle if no ovarian stimulation is needed.
Medical indications for each option
Fresh transfer may be recommended when:
- Uterine lining and hormone levels are optimal after stimulation.
- No risk of ovarian hyperstimulation syndrome (OHSS).
- Embryo genetic testing is not required.
- Patient prefers a single-cycle approach.
Frozen transfer may be recommended when:
- Risk of OHSS is high (e.g., high estrogen levels or many follicles).
- Preimplantation genetic testing (PGT) is planned.
- Uterine lining is not ideal in the fresh cycle.
- Patient wants to delay transfer for personal or medical reasons.
- Embryo donation or surrogacy is involved.
Questions to ask your clinic
- What are your success rates for fresh vs frozen transfers for patients my age?
- What is the total cost of a frozen transfer cycle, including storage and thawing?
- How long can embryos be stored, and what are the storage fees?
- What is the recommended protocol for preparing the uterus for a frozen transfer?
- Are there any medical reasons why I should choose one option over the other?
Next steps
- Discuss your medical history and cycle response with your fertility specialist.
- Ask for a personalized recommendation based on your embryo quality and uterine assessment.
- Review the clinic’s consent forms and storage policies for frozen embryos.
- Consider your timeline and financial plan when deciding.
For more information, see our FAQ and guides, or contact us for assistance.
Frequently asked questions
Which has a higher success rate, fresh or frozen embryo transfer?
Success rates depend on many factors including embryo quality, uterine receptivity, and patient age. Some studies show frozen transfers may have slightly higher implantation rates, but fresh transfers remain effective. Ask your clinic for their specific data.
Is frozen embryo transfer more expensive than fresh in Thailand?
Frozen transfer adds costs for freezing, storage, and thawing, but may reduce medication and monitoring costs since no ovarian stimulation is needed. Total cost varies by clinic; confirm with your provider.
How long does a frozen embryo transfer cycle take?
A frozen transfer cycle typically takes 2–4 weeks, depending on whether you use a natural or medicated cycle. The timeline is more flexible than a fresh cycle.
Can I choose fresh or frozen transfer based on personal preference?
Yes, in many cases you can discuss your preference with your doctor. However, medical factors such as OHSS risk or embryo testing may influence the recommendation.
Does freezing embryos affect their quality?
Modern vitrification techniques have high survival rates, and frozen embryos generally have similar potential to fresh ones. However, not all embryos survive thawing; ask your clinic about their survival rates.
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.
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