Frozen Embryo Transfer (FET) is an assisted reproductive treatment in which a previously frozen embryo is thawed and transferred into the uterus. It is commonly used as part of IVF treatment when suitable embryos remain after an earlier IVF or ICSI cycle. FET may also be planned when embryos have been frozen for fertility preservation or when a fresh embryo transfer is not recommended.
How Does FET Work?
Before the transfer, your fertility specialist prepares the uterine lining and monitors the cycle using ultrasound and, when appropriate, blood or urine tests. Depending on your menstrual cycle and medical needs, FET may be performed during a natural cycle or with hormonal medication. The selected embryo is carefully thawed and transferred into the uterus using a thin catheter.
What to Expect After FET
Your fertility team will provide instructions regarding medications, follow-up, and pregnancy testing. Not every embryo survives the thawing process, and pregnancy outcomes vary based on individual factors such as age, embryo quality, and reproductive history.