Physiological characteristics of primary hemostasis in cows during breast

The basis for the normal functioning of primary hemostasis is the physiological sufficiency of the activity of the components that ensure its operation in vivo. Such a balance of indicators creates the conditions for a sufficient degree of fluid properties of blood in the capillaries and at any stage of ontogenesis. The work was carried out on 47 cows of black-motley breed of optimal functional status, which were examined 7 times during pregnancy. In the observed cows, a regular dynamics of the activity of vascular-platelet hemostasis was revealed during the period of pregnancy as a result of inhibition of platelet aggregation and increased disaggregation capabilities of the vessel walls. The dynamics of the activity of platelet and vascular components of the hemostatic process, found during the observation in cows, should be considered as an important mechanism for ensuring their high fluidity and providing conditions for optimum fetal trophicity.