The article presents the results of morphological, biochemical and immunological studies of the blood of cows using biologically active drugs. A double administration of aminoseleferon-b 45 and 15 days before calving at a dose of 5 ml with a 24-hour interval helps reduce the processes of lipid and protein peroxidation, the phenomena of endogenous intoxication with a simultaneous increase in humoral and cellular defense, activation of the antioxidant system. This is manifested by a decrease in the incidence of uterine subinvolution – by 1.3-1.6 times and postpartum endometritis - by 1.6-2.0 times.

The article presents the results of studying changes in hematological and biochemical indicators in pregnant sows during different gestation periods on an industrial pig breeding farm. It has been established that more pronounced changes are noted with an increase in the duration of gestation and are manifested by a decrease in the serum content of erythrocytes, hemoglobin, color index (globular value), platelets, albumins, iron, an increase in hematocrit, ESR, globulins to maintain balance in the hemostasis system.