Signs of Impending Calvingin Beef Cows Under Various Feeding and Housing Conditions

Ugnivenko, А. M.; Бондаренко, Г. А.; Nosevych, D. K.; Demchuk, S. Yu.

doi:10.31548/animal2019.01.061

Cited by 2 publications

(3 citation statements)

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“…Such use of prophylactic drugs will help to synchronise the heifers' sexual desire and increase their fertility during insemination. And the organisation of cattle reproduction and the proposed biotechnological ways to improve artificial insemination of the red steppe breed breeding stock will significantly improve their reproductive status, which will increase the overall economic efficiency of the industry Keywords: prostaglandins; sexual desire; service period; insemination index; dry period; artificial insemination intensification of reproduction allows to increase calf yield by at least 10-15%, increase milk productivity of each cow by an average of 250-300 kg of milk per year, and extend the life of animals, which is confirmed by a number of scientists (Ponomarenko, 2005;Ugnivenko & Demchuk, 2018;Fedorovych, 2019).…”

Section: Literature Reviewmentioning

confidence: 90%

“…After 11 days, the heifers that did not come into heat were re-injected with the drugs and the following results were obtained: in both experimental groups, the same number of heifers came into heat -nine heads each, which is 50%. Females of the control group, where heifers were not administered any drugs at all, did not become pregnant, and two (11.1%) animals of the second experimental group did not become pregnant after the Ukrainian Black Sea Region Agrarian Science, 27(4), [36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51] second treatment and one head did not become pregnant in the third experimental group, which is 5.6%, respectively. In the control group (no stimulants were used), 10 heifers conceived from the 1 st insemination, which is 55.5%, in the II experimental group, where Estrofan and Tetravit were used, 14 heifers conceived from the 1 st insemination, which is 77.8%, in the III experimental group, where Catozal was used, 16 heifers conceived from the 1 st insemination, which is 88.9%.…”

Section: Source: Authors' Own Developmentmentioning

confidence: 99%

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Biotechnology of regulation of reproductive functions of Bos primigenius taurus

Gill,

Karatieieva,

Tymofiiv

2023

UBSRAS

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Since cattle are biologically capable of giving birth to only one calf per year, they are considered a single-fruited animal species. One of the cardinal methods of solving the problem of accelerated reproduction of livestock is biotechnological regulation of reproductive function in cows and synchronisation of their sexual activity. The aim of the study is to investigate the peculiarities of the reproductive function of Red Steppe cows under the influence of various methods of its regulation using modern hormonal agents. To evaluate the reproductive function of cows, generally accepted zootechnical methods were used, methods of variation statistics were used to calculate data, and biotechnological methods were used to regulate sexual activity in cows. Based on the analysis of the state of reproduction of the cattle herd, it was established that 164-187 cows and 85-96 heifers are artificially inseminated annually, which ensures the yield of calves per 100 cows of 89-91 heads and the annual introduction of 36 to 40 first-born calves per 100 cows. The shortened service period contributes to both a higher calf yield and an increase in milk yield, which is a desirable production effect. However, calving to conception interval, necessary to prepare the cow’s body for a new insemination, can be reduced to at least 30 days. Insemination of heifers with artificial insemination devices should be started when they reach a live weight of 314±6.5 kg, which will allow to obtain fertility from the first insemination at the level of 73.7-77.8% and thereby prevent obesity of heifers, which mainly reduces the percentage of fertility from the first insemination. It is necessary to establish obstetric and gynaecological examinations and treatment of problematic replacement heifers and cows, and it is advisable to use prostaglandin F2α analogues in combination with vitamins or biologically active drugs to stimulate the sexual function of cows and heifers. The use of prophylactic drugs will help to synchronise the heifers' sexual desire and increase their fertility during insemination. And the organisation of cattle reproduction and the proposed biotechnological ways to improve artificial insemination of the red steppe breed breeding stock will significantly improve their reproductive status, which will increase the overall economic efficiency of the industry

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Section: Literature Reviewmentioning

confidence: 90%