2Maxwell WMC, Johnson LA . Chlortetracycline analysis of boar spermatozoa after maturation,flow cytometric sorting, cooling or cryopreservation.Mol. Reprod. and Dev. ,1997,46:408-418.
3Cormier N, Sirard MA , Bailey JL Premature capacitation of bovine spermatozoa is initiated by cryopreservation. J. of And.,1997, 18:46 1--468.
4Critser JK, Arneson BW, Aaker DV,et al.Cryopreservation of human spermatozoa Ⅱ Post-thaw chronology of motility and of zona-free hamster ova penetration. Fer. and Ste.,1987, 47:980-984.
5Wheeler MB , Seidel GEJ. Time course of in vitro capacitation of frozen and unfrozen bovine spermatozoa. Theriogenology,1986, 22: 216.
6Garde J, Gutierrez A, Artiga CG,et al. Influence of freezing process on in vitro capacitation of ram semen. Theriogenology,1993, 39:225.
7Mattner PE, EntWistle KW , Martin ICA. Passage survival and fertility of deep-frozen ram semen in the genital tract of the ewe. Australian j. of Bio. Sci.,1969, 22:181-187.
8Hawk HW. Sperm survival and transport in the female reproductive tract. J. of Dairy Sci.,1983,66: 2645-2660.
9Harrison RAP, Ashworth PJC , Miller NGA.Bicarbonate/CO2, an effector of capacitation,induces a rapid and reversible change in the lipid architecture of boar sperm plasma membranes. Mol.Roorod. and Dev.,1996, 45:378-391.
10Hunter RHF, Flechon B , Flechon JE. Distribution,morpholog and epithelial interactions of bovine spermatozoa in the oviduct before and after ovulation:a -canning electron microscope study Tissue and Cell ,1991,23:641-656.