The American Society for Reproductive Medicine (ASRM) recommends that egg donors go through no more than six cycles, but there is no legal limitation and no tracking of egg donors who go from one clinic or broker to another. Sperm donors at the California Sperm Bank are asked to commit for at least a year and donate at least once a week. Cryopreservation is the process of slowly freezing bodily materials so that they can be used at a future date. In ART, this typically involves sperm or embryos, both of which can be successfully frozen. Egg cryopreservation, on.
