Advanced techniques include the freezing of sperm, oocytes, and gonadal tissue for their preservation to be used later on. Sperm cryopreservation is a process of collection and storing of sperm samples, particularly in cases of men who are to undergo any kind of serious medical treatment or who intend to delay their role as fathers. Oocyte cryopreservation is a process that cryopreserves eggs and allows women to prolong fertility or delay childbearing. Gonadal tissue freezing, either ovarian or testicular, is used for the preservation of fertility in patients facing medical conditions or treatments that may affect their reproductive health. Such methods make sure that in the future there will be possibilities for conception and increase the chances of getting pregnant later on in life by assisted reproductive technologies.