Embryo Freezing and Frozen Embryo Transfer (FET)

Embryos may be frozen and stored for a number of reasons. The most common reason is to preserve spare embryos after IVF or ICSI. Usually only good quality embryos will be frozen, as these have the highest chance of surviving the freezing and thawing process.

Frozen embryos may be stored for up to 10 years, or in exceptional circumstances, until the woman reaches the age of 55. Embryos must by law, either be used by the end of this period, or they will be removed from storage. It is the policy of the Unit to offer storage for up to 5 years in the first instance, but this may be extended where appropriate.

During a FET cycle drugs are used to ensure the lining of the womb (endometrium) is ready to receive the embryos. It is much less involved than a full cycle of IVF as there is no stimulation of the ovaries, no egg collection, and no anaesthetic. The clinic also offers natural cycle FET, where no drugs are used. This is available after discussion with a clinician.