{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T19:05:49Z","timestamp":1791486349624,"version":"4.3.4"},"reference-count":0,"publisher":"ScopeMed","issue":"0","license":[{"start":{"date-parts":[[2024,4,17]],"date-time":"2024-04-17T00:00:00Z","timestamp":1713312000000},"content-version":"vor","delay-in-days":107,"URL":"https:\/\/bdvets.org\/JAVAR\/?sec=licenseinfo"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Adv Vet Anim Res"],"published-print":{"date-parts":[[2024]]},"abstract":"<jats:p>Objective: This study aimed to determine the effects of biologically active substances and electrical stimulation of the uterus in cows on the effectiveness of estrus synchronization.\nMaterials and Methods: Ninety (n = 90) Kazakh white-headed cows were synchronized with two injections of gonadotropin-releasing hormone on days 0 and 9 and prostaglandin F2\u03b1 on day 7. The cows were divided into six groups and, during the protocol, treated with biologically active substances (Tetramag, Selevetum, antiseptic-stimulator Dorogov 2 fraction, groups 2, 3, and 4). Cows in groups 5 and 6 were treated with the same substances but additionally had electrical stimulation of the uterus, while cows in group 1 were left untreated and served as a control.\nResults: The results have shown that on Day 0, no differences were observed in E2 concentrations between the groups. However, on the 10th day, a significant disparity was noted in the E2 level among cows in group 6 compared to groups 2, 3, 4, and the control group. Conversely, no significant differences were observed between groups 5 and 6. Likewise, the fertility rate in cows from group 6 was significantly higher compared to groups 2, 3, 4, and the control group, with no significant differences between groups 5 and 6.\nConclusion: It can be concluded that the utilization of electrical stimulation of the uterus and the inclusion of certain biological substances during the estrus synchronization protocol demonstrate a positive effect on the reproductive performance of beef cattle in Kazakhstan.<\/jats:p>","DOI":"10.5455\/javar.2024.k753","type":"journal-article","created":{"date-parts":[[2024,4,17]],"date-time":"2024-04-17T15:11:35Z","timestamp":1713366695000},"page":"1","source":"Crossref","is-referenced-by-count":1,"title":["Improving the efficiency of estrus synchronization in cows"],"prefix":"10.5455","author":[{"given":"Mardan","family":"Julanov","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kumis","family":"Jumatayeva","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kanat","family":"Koibagarov","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Orynbay","family":"Tagayev","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yerbulat","family":"Baitlessov","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nursulu","family":"Julanova","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"3407","container-title":["Journal of Advanced Veterinary and Animal Research"],"original-title":[],"link":[{"URL":"https:\/\/ejmanager.com\/mnstemps\/39\/39-1696411289.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T18:02:14Z","timestamp":1791482534000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.ejmanager.com\/mnstemps\/39\/39-1696411289.pdf"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024]]},"references-count":0,"journal-issue":{"issue":"0","published-print":{"date-parts":[[2024]]}},"URL":"https:\/\/doi.org\/10.5455\/javar.2024.k753","relation":{},"ISSN":["2311-7710"],"issn-type":[{"value":"2311-7710","type":"electronic"}],"subject":[],"published":{"date-parts":[[2024]]}}}