Available at Cherish, vitrification is one of the latest advancements in fertility treatment. The process refers to the freezing of eggs (also embryos) to store them for an indefinite period. Unlike sperms, unfertilized ova cannot be stored using the slow freezing technique. Rather, vitrification works by using higher concentrations of cryoprotectants that ensure much faster cooling rates, and without the formation of ice crystals. It is useful for women who face the possibility of sterilization in future.