Abstract: The fertility preservation is suitable for those patients with primary ovarian insufficiency, tumor, autoimmune disease, and those people who want to postpone parenthood. Young women with tumor will be the main population of fertility preservation because radiotherapy and chemotherapy always impaire their fertility and living quality. There are three kinds of fertility preservation technology: embryo freezing, oocyte freezing and ovarian tissue cryopreservation. The technology of embryo freezing has been successfully used in clinical practice. The technology of oocyte freezing is getting mature. However, the technology of ovarian tissue cryopreservation is still at the early stage of research. Both of slow-freezing method and virtification method can be applied in fertility preservation techniques, with own advantages and disadvantages. The paper mainly introduces the methods of fertility preservation and the problems needed to be solved.

Key words: Female, Fertility, Cryopreservation, Oocytes, Neoplasms