“…Recently, different vitrification methods for cryopreservation of COCs have been reported in yaks (Pan, Cui, He, et al., ), pigs (Uchikura, Matsunari, Nakano, Hatae, & Nagashima, ), sheep (Hosseini et al., ), rabbits (Lavara, Baselga, Marco‐Jimnez, & Vicente, ) and mice (Mazur & Paredes, ). Vitrification methods include the cryoloop (Lane, Schoolcraft, Gardner, & Phil, ), solid surface (Dinnys, Dai, Jiang, & Yang, ) and CT methods (Kuwayama, ).…”