Oocyte Freezing

Oocyte Freezing

Oocyte freezing is beneficial to the medical practice in the Reproductive Medicine area. Frozen oocytes can be used with different purposes: increase the efficacy of in vitro fertilization; as an alternative to the freezing of embryos, particularly for couples with ethical or religious restrictions to this method; donation program with oocyte bank; and mainly to preserve fertility in women who require surgery for the removal of the ovaries, radiotherapy, or chemotherapy to treat cancer that may lead to early menopause or in those who wish to postpone motherhood.

This latter has become more and more frequent over the years since currently women have greater participation in the work market and oftentimes wish to get pregnant after the age of 35.

The best oocyte freezing technique is vitrification with survival rates of the oocytes upon thawing of up to 95%. However, it is important to emphasize that the freezing of oocytes does not ensure a future pregnancy, as well as the entire treatment in the human reproduction area. Chances of getting pregnant are of about 45% per attempt and it is ideal to freeze the oocytes up to the age of 38, when the pregnancy rates are better.

If a woman freezes her oocytes up to the age of 35, even if she thaws her oocytes and get pregnant at 40, the chances of a full-term pregnancy are similar to those of a 35-year old, that is, about 45% and not 15%, which is the percentage of a woman getting pregnant at 40 with in vitro fertilization.

Therefore, if a woman thinks about postponing pregnancy for work reasons or because she has not found an ideal partner, oocyte freezing can be a good investment in the dream of future pregnancy.

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