Frozen Embryo Transfer

A frozen embryo transfer (FET) is a procedure where embryos that were cryogenically stored (frozen) from a previous IVF or donor egg cycle are thawed and transferred to a uterus as part of an in vitro fertilization (IVF) cycle.

After the lab development of the embryos for 1-6 days, cryopreservation for times ranging from days up to several years, hormonal treatments to prepare the uterine lining to receive the embryo, and thawing of the preserved embryo is followed by transfer to the uterus. Progesterone may be prescribed following the procedure.