Oocyte vitrification: Stop the clock .

Vitrification is a recently developed technique that allows freezing of oocytes.

This may be necessary for women who need to start with a treatment that could damage their fertility, ex. Chemotherapy.

But also women who wish to delay their pregnancy can use this technique. The biological clock of the eggs is stopped at the moment of freezing. In this way, women can gain time. It is advisable to do so before the age of 35 years.