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The vitrification of oocytes allows mature eggs obtained following ovarian stimulation to be cryopreserved. It is a cryopreservation technique that keeps the eggs vitrified in liquid nitrogen. When the patient is ready to use the eggs, they can be thawed (devitrified) and with the same prognosis as at the time when they were vitrified. Preserving fertility means safeguarding the possibility of becoming pregnant at a later date.
This technique is very useful for women who are diagnosed with cancer. Chemotherapy and radiotherapy are aggressive treatments that affect the entire body and especially the reproductive organs, sometimes leaving the woman infertile. If the eggs are frozen before receiving treatment, the possibilities of having children afterwards are considerably increased.
Egg freezing for social reasons is a way for women who do not want to become pregnant or have not yet found a partner to preserve her fertility. Around 35, a woman´s egg quality begins to decrease dramatically. This means that the chances of becoming pregnant and having a healthy baby progressively declines over the years. With vitrified oocytes a woman can postpone having a baby until she feels ready.
Egg freezing can also help young women with severe endometriosis as well as those who are about to be treated with cytotoxins: medication used to treat autoimmune diseases. These medications that attacks cells and sometimes decrease fertility.