Nowadays the strategies have been developed which allow the long-term storage of gametes and embryos. Since mature oocytes are rare and very valuable cells, so the way that they will produce a higher number of oocytes would be useful for the reproductive processes of animals and clinical activities. Low success of the methods such as oocyte cryopreservation led to the focus of research on the freezing of primary follicles containing oocytes in the ovarian cortex. In this article, we describe the ovarian tissue cryopreservation processes.
