Dependence of the quality of embryos on the physiological state of cows

Abstract

Embryos obtained from healthy cows with an average milk productivity are of higher quality and viability. Optimal results of cryopreservation of embryos from the highly productive and problem donor cows can be obtained only by traditional freezing technology. The quality and effectiveness of cryopreservation of embryos from cows with an average productivity does not depend on the technological method of cryopreservation. In addition to visual methods for assessing quality, a method for determining the viability of embryos by cultivation is used. This method is used both for freshly obtained and for thawed embryos of bovine animals. According to the results of our studies, the need to confirm the viability of thawed embryos by the cultivation method has been revealed, which will reduce the costs caused by the possibility of transplantation of nonviable embryos by 1/3.