Following this trend, in recent years, researchers working with cryopreservation of preantral follicles around the world have been seduced by the concept of vitrification. The idea of a simple and fast protocol that is easy to master and does not require special equipment is very appealing. Indeed, the procedure can be performed in any laboratory, even in the operating room simultaneously with patient surgery, or out in the field, soon after the death of a wild animal. The idea becomes even more attractive when added to the successful results obtained with embryos