Progress on Vitrification of Oocytes from Mammalian Species

In comparison to the cryopreservation of preimplantation embryos,cryopreservation of oo- cytes from most mamrhalian species has been more challenging due to their extreme sensitivity to subopti- mal conditions during the cryopreservation process.Recent attempts to find a successful cryopreservation technique for oocytes have been directed to the use of vitrification by rapid cooling.They allow ooc…