“…The technique of ultra-rapid cryopreservation (i.e. vitirification) has shown excellent survival rates (80-95%) Garcia-Velasco et al, 2013;Kim et al, 2011;Parmegiani et al, 2011;Rienzi et al, 2012), and great fertilization and implantation rates (Alpha Scientist in Reproductive Medicine and ESHRE Special Interest Group in Embryology, 2011; Cobo et al, 2013;Garcia-Velasco et al, 2013;Rienzi et al, 2012). We, and others (Cobo and Diaz, 2011;Cobo et al, 2010;Parmegiani et al, 2011) have consistently shown that cryopreservation of oocytes through vitrification is an effective, simple, safe, and efficient technique for fertility preservation in women who are about to start oncological treatments with gonadotoxic impact.…”