Vitrification is a technique used in the assisted reproduction laboratory to preserve the fertility of women. Mature ovules obtained by follicular puncture can be preserved or used to perform an IVF / ICSI treatment. The basic principle of vitrification is to remove as much water as possible from the cells and replace that water with a cryoprotectant that prevents the formation of ice crystals when these cells are stored in liquid nitrogen at -196ºC. The vitrification technique is also used to keep stored surplus embryos that have been generated in a fertility treatment. The course will teach the students the different vitrification techniques and will allow them to practice the same.