{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,2]],"date-time":"2025-11-02T16:58:21Z","timestamp":1762102701847,"version":"3.40.5"},"reference-count":34,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2022,2,22]],"date-time":"2022-02-22T00:00:00Z","timestamp":1645488000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003668","name":"Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, Forestry and Fisheries","doi-asserted-by":"publisher","award":["MAFRA\u2010120011\u20102","MAFRA\u2010120011021"],"award-info":[{"award-number":["MAFRA\u2010120011\u20102","MAFRA\u2010120011021"]}],"id":[{"id":"10.13039\/501100003668","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003725","name":"National Research Foundation of Korea","doi-asserted-by":"publisher","award":["NRF\u20102020R1F1A1052024","NRF\u20102021R1F1A1051953"],"award-info":[{"award-number":["NRF\u20102020R1F1A1052024","NRF\u20102021R1F1A1051953"]}],"id":[{"id":"10.13039\/501100003725","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Veterinary Medicine &amp; Sci"],"published-print":{"date-parts":[[2022,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>With unique genetic traits, Hanwoo cattle (<jats:italic>Bos taurus coreanae<\/jats:italic>) are well\u2010adapted to the Korean environment. However, their perinatal mortality rate is 2%\u20133%, which imposes an economic burden.<\/jats:p><\/jats:sec><jats:sec><jats:title>Objective<\/jats:title><jats:p>Due to insufficient data on hormonal changes around parturition, the timing of parturition is often predicted subjectively; few studies have examined hormones in Hanwoo cattle. We measured the changes in various hormones around parturition, to seek an objective predictor of parturition time.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>In 14 female Hanwoo cattle, we measured progesterone, prolactin and cortisol concentrations daily in jugular vein blood samples, beginning 6 days before parturition until 7 days after parturition. Conception was induced in five animals using artificial insemination. Nine animals received embryo transfer.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>During parturition, the concentration of progesterone decreased significantly in the embryo transfer group (<jats:italic>n<\/jats:italic>\u00a0=\u00a09) and in the total population (<jats:italic>n<\/jats:italic>\u00a0=\u00a014); it did not change significantly in the artificial insemination group (<jats:italic>n<\/jats:italic>\u00a0=\u00a05). Prolactin concentration increased on the day of parturition but did not differ significantly among the groups. Cortisol remained constant throughout the study course.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>We concluded that parturition time can be predicted in Hanwoo cattle using progesterone concentration. This knowledge can reduce perinatal mortality, which would help to improve farm income and animal welfare.<\/jats:p><\/jats:sec>","DOI":"10.1002\/vms3.777","type":"journal-article","created":{"date-parts":[[2022,2,22]],"date-time":"2022-02-22T23:02:55Z","timestamp":1645570975000},"page":"1258-1263","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Differences in hormone levels around parturition in Hanwoo cattle (<i>Bos taurus coreanae<\/i>) following artificial insemination and embryo transfer"],"prefix":"10.1002","volume":"8","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2593-6529","authenticated-orcid":false,"given":"Junkoo","family":"Yi","sequence":"first","affiliation":[{"name":"Livestock Research Institute  Yeongju\u2010si Gyeongsangbuk\u2010do Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Soo\u2010Young","family":"Yum","sequence":"additional","affiliation":[{"name":"Lartbio Co., Ltd.  Gangnam\u2010gu Seoul Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4820-4438","authenticated-orcid":false,"given":"Daehyun","family":"Kim","sequence":"additional","affiliation":[{"name":"Livestock Research Institute  Yeongju\u2010si Gyeongsangbuk\u2010do Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sera","family":"Han","sequence":"additional","affiliation":[{"name":"Lartbio Co., Ltd.  Gangnam\u2010gu Seoul Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jaejung","family":"Ha","sequence":"additional","affiliation":[{"name":"Livestock Research Institute  Yeongju\u2010si Gyeongsangbuk\u2010do Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jisu","family":"Kim","sequence":"additional","affiliation":[{"name":"Lartbio Co., Ltd.  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Gangnam\u2010gu Seoul Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6513-557X","authenticated-orcid":false,"given":"Joonho","family":"Moon","sequence":"additional","affiliation":[{"name":"Lartbio Co., Ltd.  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