TY - JOUR AU - Kambur, Maria AU - Zamaziy, Andriy AU - Nechiporenko, Oleksandr AU - Kalashnyk, Oleksandr AU - Denis Matveychuk, Denis AU - Kalashnyk, Maksim PY - 2021/03/31 Y2 - 2024/03/28 TI - Effect of Rheology of Blood and Haemostasis of the Cows on the Viability of the Offspring and Reproduction JF - Bulletin of Sumy National Agrarian University. The series: Veterinary Medicine JA - vm VL - IS - 1 (52) SE - Veterinary medicine DO - 10.32845/bsnau.vet.2021.1.1 UR - https://snaubulletin.com.ua/index.php/vm/article/view/404 SP - 3-11 AB - The Results of the studies indicate that in 45.44% of cows-the initial duration of the third period of genera was more than 9 hours, and in cows of the second - third lactation only in 27.28% of animals. Morphometry indicators of a body mass of newborns calves and placenta show the conditions of growth and development of fetal, which are connected with functional activity of the feto-placental complex and on average, the body weight of the calves of the first subgroups (animals derived from cows with the duration of the third period of genera up to six hours) proved by20.80%-21.20% more than the calves of the fourth subgroups. Below the mass proved and placenta of calves, fourth subgroups (in 1.25 by Times – 1.18 by Times, (P < 0.05), compared to this indicator of the first subgroups of calves. Increased activity of the factors of hemostasis and rheology of blood is set in animals in which the duration of time of the third period of genera was up to 12 and more hours. Under these conditions, the viscosity of animal blood in 1.39-1.40 by Times, (P < 0.05) and 1.30-1.40 by times (P < 0.05), the content of Fibrinogen in 2,47-2,04 by Times<0.01). The given data indirectly indicate the increase of blood viscosity, reduction of its blood flow, especially in the capillary system vessels.  In our opinion, this is the cause of the birth of animals with low viability as evidenced by the coefficients of the catabolism factor, oxygenic homeostasis, samples of Mack Klur Aldrich, "immature" surfactant system. Recovery of the reproductive function of cows after calving and duration service period in animals of the first subgroups was in 1.17 – 1.14 by times shorter than in cows of the fourth subgroups ER -