Reproductive qualities level of cows against tissue preparations use

The aim of the study is to determine the level of reproductive performance in cows using tissue preparations. The experiment was conducted in 2023 on Simmental cows during the milking period at the Novotalitskoye Experimental Station, Charyshsky District, Altai Region, Federal State Budgetary Institution FANZA. The experimental cows were administered tissue biostimulants: in the 1st experimental group - Biostimulgin at a dose of 30 ml/head, in the 2nd - ASD-2 fraction at a dose of 2 ml/head in combination with Eleovit at a dose of 10 ml/head, in the 3rd - a tissue preparation at a dosage of 22.5 ml per head per day. The studied tissue preparations were administered subcutaneously in the lower third of the neck, 4 times in the 1st and 2nd experimental groups with an interval of 7 days, in the 3rd experimental group - with an interval of 14 days. The tissue biostimulant made from slaughterhouse waste of antler deer had the greatest impact on the level of reproductive qualities: the time from calving to the first heat decreased by 4.3 %, the proportion of pregnant cows after the first insemination increased by 20.0 %, the service period became shorter by 11.6 % (p