Cryopreservation may be executed as oocyte cryopreservation in advance of fertilisation, or as embryo cryopreservation after fertilisation. This portion needs added citations for verification. You should help strengthen this informative article by incorporating citations to reputable resources In this particular area. Unsourced materials can be challenged and eradicated. (July 2020) https://socialbuzzmaster.com/story3995473/the-basic-principles-of-assisted-reproductive-technology