2Tatemoto H, Muto N, Sunagawa I, et al. Protection of porcine oo- cytes against cell damage caused by oxidative stress during in vitro maturation : role of superoxide dismutase activity in porcine follicular fluid [J]. Biol Reprod, 2004, 71(4): 1150-1157.
3Viet Linh N, Dang-Nguyen T Q, Nguyen B X, et al. Effects of cys- teine during in vitro maturation of Porcine oocytes under low oxygen tension on their subsequent in vitro fertilization and development [J]. J Reprod Dev, 2009, 55(6) : 594-598.
