Freezing oocytes

Freezing oocytes ( immature ova ) is a technique used in assisted reproduction that serves to preserve, ie to maintain their structures so dormant for a while. The oocytes that survive the thawing have a like of which have never frozen behavior. This means that their quality is not altered, and that subsequently can be fertilized with the sperm of the couple or a donor in a laboratory and then implanted in the uterus of women those embryos that develop, leading to a possible pregnancy. Oocytes therefore are not fertilized before freezing. Before starting treatment, the patient must take drugs to produce a large number of ovules along two or three weeks.