Travetskyi M. Clinical and experimental substantiation of increase fertilization of cows by stimulation and synchronization of estrus

The dissertation is devoted to the study of the prevalence of disfunction of ovaries for anesthetic in cows in relation to the season of calving and their fertility, depending on the state of genital organs, the level of progesterone and metabolism before the synchronization of the estrus, the expediency of using biologically active substances in the protocol of the estrus synchronization and the combination of the application of the sulfagon on the heel and nonsteroidal anti-inflammatory drugs on the eleventh day after insemination to increase fertility and reduce embryonic mortality in large cattle. Summarizing the results of the studies, it can be concluded that the synchronization of the oestrus 50–90 days and 91 and more days after calving and the introduction of the morphogonum for 5 days after insemination contributes to an increase in the fertility of cows in the second group by 5.8 %. At the same time, the use of ainilum for 11 days after insemination contributes to increase fertility of cows of the second group by 9.9 % compared with animals of the second control group. Combined use of sulfagon for 5 days and ainil at 11 days after insemination in cows of the first group contributes to their fertility increase by 7.5 % compared with the control animals, and in the second group of animals – by 12.6 %. During the re-diagnosis of pregnancy in cows 60–65 days after insemination, the absence of pre-identified colony in 5.0–11.4 % of animals was established, indicating the presence of late embryonic mortality. In particular, the use of sulfagon after insemination reduced the number of pregnant cows by 2.7 %, ainilus – 4.6 %, sulfagon and ainilum – by 2.3 %, in the control group by 4.1 %. In cows treated with surfagon on the 5th day after inoculation, the incidence of embryonic death decreased by 1.7 times compared with the control group of animals. Introduction of ainilum for 11 days after insemination and its combination with the use of sulfagon for 5 days contributed to a reduction in embryonic mortality in 1.1 and 2.3 times, respectively.