{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T16:00:05Z","timestamp":1790524805942,"version":"4.1.0"},"reference-count":0,"publisher":"Oxford University Press (OUP)","issue":"2","license":[{"start":{"date-parts":[[1976,11,1]],"date-time":"1976-11-01T00:00:00Z","timestamp":215654400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"content-domain":{"domain":["reproduction-online.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[1976,11,1]]},"abstract":"<jats:p>Summary. Testosterone, oestradiol and progesterone were measured in peripheral plasma during the oestrous cycle of 6 heifers. Oestradiol and progesterone results confirmed earlier reports. Concentration of testosterone on the day of oestrus was 40 \u00b1 3 pg\/ml (mean \u00b1 S.E.M.), and two peaks were detected during the cycle, one 7 days before oestrus (1809 \u00b1 603 pg\/ml) and the other (78 \u00b1 7 pg\/ml) on the day before the onset of oestrus. The concentration of progesterone declined in most cases 1 day after the maximum concentration of testosterone.<\/jats:p>\n                  <jats:p>Betamethasone treatment in 5 heifers extended luteal function by an average of 10 days: plasma androstenedione and oestradiol concentrations were unaltered; cortisol values were depressed for at least 16 days after treatment; testosterone concentrations were lowered by 13 \u00b1 2\u00b74% during treatment, and except in one heifer the peak on Day -7 was abolished.<\/jats:p>","DOI":"10.1530\/jrf.0.0480341","type":"journal-article","created":{"date-parts":[[2004,3,20]],"date-time":"2004-03-20T03:12:46Z","timestamp":1079752366000},"page":"341-345","update-policy":"https:\/\/doi.org\/10.1530\/rep\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":69,"title":["Concentration of steroids in bovine peripheral plasma during the oestrous cycle and the effect of betamethasone treatment"],"prefix":"10.1093","volume":"48","author":[{"given":"L. N.","family":"Kanchev","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hilary","family":"Dobson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"W. R.","family":"Ward","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"R. J.","family":"Fitzpatrick","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[1976,11,1]]},"container-title":["Reproduction"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/academic.oup.com\/reproduction\/article-pdf\/48\/2\/341\/64931590\/jrf_48_2_020.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/academic.oup.com\/reproduction\/article-pdf\/48\/2\/341\/64931590\/jrf_48_2_020.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,1,7]],"date-time":"2026-01-07T22:08:18Z","timestamp":1767823698000},"score":1,"resource":{"primary":{"URL":"https:\/\/academic.oup.com\/reproduction\/article\/48\/2\/341\/8289317"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1976,11,1]]},"references-count":0,"journal-issue":{"issue":"2","published-print":{"date-parts":[[1976,11,1]]}},"URL":"https:\/\/doi.org\/10.1530\/jrf.0.0480341","relation":{},"ISSN":["1470-1626","1741-7899"],"issn-type":[{"value":"1470-1626","type":"print"},{"value":"1741-7899","type":"electronic"}],"subject":[],"published-other":{"date-parts":[[1976,11,1]]},"published":{"date-parts":[[1976,11,1]]}}}