Through a number of national and international networks and societies, such as the European Society of Human Reproduction and Embryology (ESHRE), the Fertility Consortium in the USA and the International Society of Fertility Preservation, emerging evidence has demonstrated that FP methods, previously deemed experimental, such as the transplantation of ovarian tissue and administration of GnRH agonists, are effective treatments for FP in cancer patients [34,35]. Here, GNRH1 is linked to cancer.