Any suitable embryos that are left over, following conventional IVF, ICSI or GIFT treatment, may be frozen for future use. These can be transferred at a later date in order to increase the pregnancy potential from any single ovarian stimulation and egg collection procedure.
Freezing of excess embryos occurs in approximately 10% of treatment cycles. It must be noted that not all embryos will survive the freezing and thawing process. At the ARGC, embryos are normally frozen at the blastocyst stage.
Egg freezing is available for social reasons or for women undergoing medical treatment such as chemo/radiotherapy. The chance of achieving a pregnancy from frozen eggs is lower than that from frozen embryos.