Cryopreservation is a process in which the embryologist freezes eggs, sperm, ovarian tissue and embryos with liquid nitrogen at a very low temperature. The clinician uses a procedure called vitrification, freezing the eggs so quickly that there is no time for ice crystals to form thus preventing damage to the eggs. Specimens for future usage are moved to a cryobank for long-term storage.
There are many benefits to the cryopreservation of embryos. This treatment allows the preservation of eggs, sperm, ovarian tissue and embryos for later usage. Cancer patients are prime candidates for this type of fertility preservation. It also removes the need for ovarian stimulation during each cycle of IVF. Most importantly, it reduces the risk of multiple births by removing the need to use excess embryos during one cycle of IVF.