Hormonal pattern in heifers and fresh cow with different genotype under the influence of stimulation of milk gland during the preparation to calving

The authors studied the effect of mechanic-thermal-electrostatic stimulation of udder during the preparation to calving on concentration of cortisol, progesterone, thyrotrophic hormone and prolactin in the blood of heifers and fresh cows of the Ayrshire breed, and also in hybrids F1 (Red Steppe × Holstein). It was shown, that udder stimulation in heifers by means massage device (Kuban'-4) takes an effect on hypothalamic-pituitary system that promote to an increase in physiological processes and lactopoiesis: milk volume of basis fattiness from hybrid and pure-blooded cows during year was 3964 and 4201 kg, respectively, at the same time the average milk volume in herd was 3520 kg.