Frozen Embryo Transfer (FET): FAQs, Process & Success Rates

Frozen embryo transfers (FET) allow patients to use previously frozen embryos, with success rates comparable to fresh IVF cycles. Dr. Benjamin S. Harris explains the 6-8 week FET process, which includes hormone suppression, uterine lining preparation, and progesterone supplementation. Genetic testing and reduced medication stress are key advantages of FET over fresh cycles.

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Key Takeaways

Frozen Embryo Transfer Success Rates vs. Fresh IVF Cycles

FET success rates match fresh IVF cycles and may even be higher due to optimized uterine lining and progesterone levels. The primary factor affecting success remains the maternal age at the time of embryo freezing, not the time between freezing and thawing.

Benefits of Frozen Embryo Transfers Over Fresh Cycles

FET cycles reduce medication stress by eliminating ovarian stimulation and anesthesia for egg retrieval. They allow preimplantation genetic testing for chromosomal abnormalities and offer greater predictability, with fewer cycle cancellations compared to fresh IVF.

How to Prepare for a Frozen Embryo Transfer Cycle

The 6-8 week FET process begins with birth control to suppress ovulation, followed by hormone therapy (estrogen, Femara, or FSH) to thicken the uterine lining. Progesterone is added later, and the transfer occurs after confirming optimal hormone levels and endometrial thickness via bloodwork and ultrasound.

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