Frozen embryo transfer (FET) is a technique used in assisted reproductive
technology (ART) to increase the chances of a successful pregnancy. It involves
thawing and transferring previously frozen embryos to the uterus of the female

Embryos can be frozen at various stages of development, including at the cleavage stage (2-3 days after fertilization) or at the blastocyst stage (5-7 days after fertilization). The process of freezing embryos is called cryopreservation, and it involves cooling them to very low temperatures (typically -196°C) to preserve them for later use.

Frozen embryo transfer can be used for several reasons. For example, it can be
used to preserve extra embryos that are not needed for an initial fresh cycle of IVF, or to delay pregnancy for medical or personal reasons. FET can also be used to increase the chances of a successful pregnancy by allowing the uterus to recover from the effects of ovarian stimulation and providing more time for the uterus to become receptive to the embryo.

The process of FET involves thawing the frozen embryos and transferring them to
the uterus of the female partner. The timing of the transfer is typically based on the woman& menstrual cycle and hormone levels. The procedure is similar to a fresh embryo transfer, and involves inserting a catheter through the cervix and into the uterus to deliver the embryos.

Overall, FET is a safe and effective technique for increasing the chances of a successful pregnancy, and it has helped many couples to conceive and start a