Oocyte freezing or Egg freezing is a process in which a woman's eggs (oocytes) are extracted, frozen and stored as a method to preserve reproductive potential in women of reproductive age.
These cryopreserved eggs are placed in warming solution and assessed in time of need. Those eggs that survived the freezing process are fertilized with intracytoplasmic sperm injection (ICSI), where a single sperm is injected directly into the egg, and the fertilized eggs will grow in culture until the embryo(s) are ready to be transferred into the uterus to achieve pregnancy, typically 3-5 days after fertilization. The women who possess the risk of premature ovarian failure can make use of egg freezing. Also those who are to be subjected to surgeries which may cause damage to the ovaries.