t he zona pellucida of stored canine oocytes . J Reprod Fertil.2000 , 119 (1) :77-83.РWalters, A.H., Eyestone, W.E., Saacke, R.G., Pearson, R.E., Gwaszdauskas, F.C. Bovine embryo development after IVF with spermatozoa having abnormal morphology. Theriogenology,2005, 63, 1925-1937.РWatson P F. Cooling of spermatozoa and fertilizing capacity. Reprod Domest Anim.1996, 31: 135-140.РWithfield CH, Parkinson TJ. Assessment of the fertilizing potential of frozen bovine spermatozoa by in vitro induction of acrosome reactions with calcium ionophore (A23187). Theriogenology,1995,44, 413-422.РZhang BR, Larsson B, Lundeheim N, Rodrı´guez-Martı´nezH. Sperm characteristics and zona pellucida binding in relation to field fertility of frozen-thawed semen from dairy AI bulls. Int J Androl.1998, 21, 207-216.