Frozen Embryo Transfer

Frozen embryo transfer (FET) uses embryos that were previously frozen after an IVF cycle. The embryo is thawed and transferred into the uterus in a later cycle.

FET may be used when extra embryos were frozen, when a fresh transfer was postponed, after PGD or PGT testing, or when the doctor recommends preparing the uterine lining separately from the stimulation cycle.

A frozen embryo transfer cycle may be natural, modified natural or medicated depending on ovulation pattern, hormone levels and clinical preference. Monitoring helps confirm that the endometrium is ready before transfer.

The suitability and timing of FET are decided after reviewing embryo quality, previous transfer history and uterine factors.