Seasonal Variability in Cryoresistance of Saanen Goats Spermatozoa and Reproductive Characteristics

Cryopreservation of gametes is one the important stages assisted reproductive technologies (ART). To obtain high results using ART, it essential to cryopreserve sperm in a favorable season, when have ability fertilize oocytes. The aim this research was study seasonal variability spermatozoa cryoresistance and characteristics Saanen goats. After removing seminal fluid, five mature animals were cryopreserved solution 10% glycerol 20% egg yolk. examined by embryo development rate on day 7 vitro culture. Reproductive goats during breeding season found be featured increased concentration motility. survival goat after cryopreservation seasonally dependent, i. e. number viable notably higher than non-breeding one. frequency oocyte fertilization use fresh derived different seasons significantly group. embryos which developed blastocyst stage lowest oocytes with obtained season. It concluded that cryotolerance are compared findings will allow develop strategy reproduction farm for food security Ukraine.