2Coacioni A C, Reichenbach H D, Schwarts J, et al. Sperm function and production of bovine embryo in vitro after swim-up with different calcitinm and caffeine concentration[J]. Animal Reproduction ,2001,67 : 56-67.
3Lighten A D,Moore G E,Winston R M,et al. Routine addition of human insulin- like growth factor-1 lingand could benefit clinical in vitro fertilization culture[J] . Human Reproduction, 1998,13 : 3144-3150.
6Figueiredo J R,et al. Extracellular matrix proteins and basement membrane stheir identification in bovine ovaries and significant for the attachment of cultured preantral follicles[J].Theriogenology, 1996,45 :889-895.
10Hagemann L J, Beaumont S E, Berg M, et al. Development during single IVF of bovine oocytes from dissected follicles:interactive effects of estrous cycle stage , follicle size and atrsia[J]. Mol. Report Dev. , 1999,53 :451-458.