The use of hormonal drugs in infertility of cows of cows

Abstract

For dairy farms, an urgent task is to annually obtain offspring from each cow, increase milk productivity after calving, and ensure the preservation of the reproductive function of the cows.
In the research work, a group of hormonal drugs for stimulating the reproductive system in lactating cows was studied. In many farms of the Smolensk region, the reproduction of the dairy herd is carried out at a low level - 20-25 calves from one hundred cows are lost annually, while they lose the milk increase in the lactation of new -bodied cows, which leads to significant economic damage.
According to the chosen scheme, cows of the experimental group (n-12) who did not come to the hunt for a long time after calving (90-110 days) were used on the farm: progesterone and bitostimulgin were injected intramuscularly on days 1.3 and 5, follimag and biostimulgin were administered on day 7 of the experiment. The experiment lasted from May 10 to October 30, 2021, followed by monitoring of pregnancy in cows until the end of this year.
The effectiveness of stimulation of reproductive function was assessed by the timing of the manifestation of hunting and the results of insemination - by determining pregnancy. The obtained results of studies on the complex use of hormonal drugs showed positive changes in the reproductive function of the reproductive organs, primarily in the ovaries – cows came to the hunt: 3 – after 12 days, 1 – on day 16 and 3 - on day 18, while all without re-entering the hunt after day 7 of the completed introduction of follimag, after insemination they turned out to be pregnant.
The injected drugs restored the function of the ovaries for the formation of follicles and the release of full-fledged eggs in 7 cows (58.2%), with a long period of infertility.