Frozen Embryo Transfer
Frozen embryo transfer (FET) is a cycle where a frozen embryo of previous fresh IVF cycle is softened to liquid and transferred back into the woman's uterus. This means it doesn’t undergo another cycle of hormone stimulation and an egg collection .This cycles can be undertaken on natural cycle by using hormone preparation or ovulation induction. Embryo freezing gives more opportunities for pregnancy for each hormone stimulation cycle and egg collection. Frozen embryos are viable to the infinite time after the first freeze. Embryo transfer can be done either after a successful or unsuccessful in vitro fertilization due to their infinite viability. Freezing embryos previously was a very slow process. But now, the applications were changes and freezing was done by a very simple and easy method called vitrification (freezing of embryos using cutting edge technology).