Frozen Embryo Transfer (FET)

Transfer of a vitrified-warmed embryo in a later cycle.

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Medically reviewed by Dr. Adnan Jabbar

· Updated April 2026

FET

Plain-English guide for patients and families.

FET uses embryos frozen after a previous IVF cycle. Vitrification (fast freeze) gives excellent survival. The uterine lining is prepared with hormones or timed to natural ovulation, then the embryo is transferred.

Benefits

Allows genetic test results to return, reduces OHSS risk in some fresh cycles, lets the body recover, and enables family building across multiple attempts from one stimulation.

AI Information

Educational

Frozen embryo transfer has become increasingly common and in many programs now accounts for over 50% of all embryo transfers. The advent of vitrification technology has made embryo survival rates after thaw exceed 95–99%, making FET outcomes comparable to — and sometimes better than — fresh transfers, particularly in high-responder patients.

Key Points

Vitrification achieves embryo survival rates of 95–99% after warming.
FET can be done in natural cycles (timed to ovulation) or medicated cycles (estrogen and progesterone).
Freeze-all strategies (no fresh transfer) may benefit high responders, OHSS-risk patients, and those awaiting PGT results.
Some studies suggest FET may have lower ectopic pregnancy rates compared to fresh transfers.
Embryos can be stored for many years without measurable decline in quality.

Who Should Know This?

IVF patients with surplus embryos, those undergoing freeze-all cycles, patients awaiting PGT results, and anyone planning to space out their family building from a single egg retrieval.

Clinical Context in Pakistan

FET is a routine and highly successful procedure at IVF Experts Lahore. Dr. Adnan Jabbar individualises endometrial preparation protocols to optimise lining thickness and receptivity before each frozen transfer.

Important Disclaimer

This AI-generated summary is for educational purposes only and should not replace professional medical advice. Always consult with Dr. Adnan Jabbar or your fertility specialist for personalised clinical guidance tailored to your specific situation.