AKA Oocyte cryopreservation. A process in which a woman's eggs (oocytes) are extracted, frozen and stored. In the future, the eggs can be thawed, fertilized, and transferred to the uterus as embryos.

Aimed at three particular groups of women: those diagnosed with cancer who have not yet begun chemotherapy or radiotherapy; those undergoing treatment with assisted reproductive technologies who do not consider embryo freezing an option; and those who would like to preserve their future ability to have children, either because they do not yet have a partner, or for other personal or medical reasons.