Embryo freeze is when extracted embryos from an IVF cycle are stored and used later on if you decide to pursue further fertility treatments. If you have undergone fertility treatments, you and your partner may have extra embryos that have not been used during your cycles. Known as Frozen Embryo Transfer, this procedure allows you to thaw and use any remaining embryos after they have been frozen and stored. During IVF, you and your partner contributed eggs and sperm to create numerous embryos. However, IVF treatment cycles only use a small number of these embryos, leaving many viable embryos unused. Numerous couples do not wish to destroy these embryos or donate them to science. Through FET, couples have the opportunity to use their remaining embryos in the future.