Cryopreservation of gametes and embryos is an essential aspect of ART.  Its widespread application has allowed increased safety and efficacy of IVF treatment. The proportion of cryopreserved embryo transfer cycles compared with fresh cycles is growing in European countries. Overall it has been monitored and has been estimated that cryopreserved cycles contributed to 32 percent of the transfer in 2011 compared to 28 percent in 2010. Preservation of the female genetics is currently done primarily by means of Oocyte and embryo cryopreservation. Two basic cryopreservation techniques rule the field controlled rate freezing the first procedure and verification which is in recent years has gained popularity.