{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,8]],"date-time":"2026-01-08T07:10:03Z","timestamp":1767856203468,"version":"3.49.0"},"reference-count":0,"publisher":"Oxford University Press (OUP)","issue":"1","license":[{"start":{"date-parts":[[1988,9,1]],"date-time":"1988-09-01T00:00:00Z","timestamp":589075200000},"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":[[1988,9,1]]},"abstract":"<jats:p>Summary. Urinary concentrations of conjugated oestrone and pregnanediol-3-glucuronide were measured during and after spontaneous and induced oestrus and during pregnancy. Behavioural oestrus was preceded by a rise in oestrone values from &amp;lt; 10 ng\/mg creatinine (Cr) to peaks of 45 ng\/mg Cr. Maximal lordotic response and mating activity coincided with the decline in oestrone levels. After presumed ovulation, urinary pregnanediol glucuronide concentrations increased from &amp;lt;5 to 15\u201330 ng\/mg Cr. Further increases in this steroid (to 60\u201380 ng\/mg Cr) occurred 114 days after mating, presumably coincident with implantation. These high levels of pregnanediol glucuronide were maintained for 3 weeks, began to decline 1 week before parturition and fell to a nadir (&amp;lt;5 ng\/mg Cr) immediately after delivery. When FSH was administered i.m. for 5 days, urinary oestrone values rose markedly and were maximal (580 ng\/mg Cr) on Day 7. Mating first occurred on Day 20 and 500 i.u. hCG were given i.m. Urinary pregnanediol glucuronide levels during the next 5 months were similar to those in the previous year during pregnancy with values rising 105\u2013108 days after mating. However, no birth occurred. These results support the suggestion that pandas exhibit delayed implantation and demonstrate that the panda is responsive to exogenous gonadotrophins.<\/jats:p>\n                  <jats:p>Keywords: giant panda; reproductive cycle; ovulation induction; oestrone; pregnanediol<\/jats:p>","DOI":"10.1530\/jrf.0.0840023","type":"journal-article","created":{"date-parts":[[2004,3,20]],"date-time":"2004-03-20T01:55:52Z","timestamp":1079747752000},"page":"23-28","update-policy":"https:\/\/doi.org\/10.1530\/rep\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":30,"title":["Urinary steroid concentrations during natural and gonadotrophin-induced oestrus and pregnancy in the giant panda (\n                    <i>Ailuropoda melanoleuca<\/i>\n                    )"],"prefix":"10.1093","volume":"84","author":[{"given":"M.","family":"Chaudhuri","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"D. G.","family":"Kleiman","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"D. E.","family":"Wildt","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M.","family":"Bush","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"E. S.","family":"Frank","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"R. B.","family":"Thau","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[1988,9,1]]},"container-title":["Reproduction"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/academic.oup.com\/reproduction\/article-pdf\/84\/1\/23\/64812349\/jrf_84_1_004.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/academic.oup.com\/reproduction\/article-pdf\/84\/1\/23\/64812349\/jrf_84_1_004.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,1,7]],"date-time":"2026-01-07T19:20:47Z","timestamp":1767813647000},"score":1,"resource":{"primary":{"URL":"https:\/\/academic.oup.com\/reproduction\/article\/84\/1\/23\/8279091"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1988,9,1]]},"references-count":0,"journal-issue":{"issue":"1","published-print":{"date-parts":[[1988,9,1]]}},"URL":"https:\/\/doi.org\/10.1530\/jrf.0.0840023","relation":{},"ISSN":["1470-1626","1741-7899"],"issn-type":[{"value":"1470-1626","type":"print"},{"value":"1741-7899","type":"electronic"}],"subject":[],"published-other":{"date-parts":[[1988,9,1]]},"published":{"date-parts":[[1988,9,1]]}}}