It is understood by preservation of fertility , the cryopreservation of gametes (sperm or ovules), ovarian tissue or embryos, in order to be able to use them later, either because of a problem that causes sterility, such as cancer, or simply because of the desire to postpone motherhood, in the case of women.
Preserve fertility in men
For the preservation of male fertility sperm are frozen in liquid nitrogen, keeping them for an indefinite time until the male wishes to use them in the future for a technique of assisted reproduction.
For them, the technique of freezing semen is indicated before receiving chemotherapy or radiation therapy, or surgery that can cause sterility, such as vasectomy.
Preserving fertility in women
In the case of women, oocytes, embryos can be vitrified, ovarian tissue can be frozen in the case of a cancer in which ovulation can not be stimulated to obtain oocytes, or immature ovaries of the ovary can be recovered and subsequently mature in the ovaries. laboratory.
As in men, for women fertility preservation techniques can be performed before a chemo or radiotherapy treatment if it is a cancerous process, or vitrify oocytes only with the desire to postpone motherhood when the woman is still young and has no stable partner.