{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,7]],"date-time":"2026-01-07T20:20:22Z","timestamp":1767817222014,"version":"3.49.0"},"reference-count":0,"publisher":"Oxford University Press (OUP)","issue":"2","license":[{"start":{"date-parts":[[1994,3,1]],"date-time":"1994-03-01T00:00:00Z","timestamp":762480000000},"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":[[1994,3,1]]},"abstract":"Two comparative studies were undertaken using adult, female red and P\u00e8re David's deer to examine the ovulatory response of these animals to a superovulation regimen and fertilization rates following inter- and intraspecific laparoscopic insemination. In Expt 1 six P\u00e8re David's deer and 12 red deer hinds were treated during the breeding season with an intravaginal progesterone-impregnated controlled internal drug release device (CIDR) for 14 days, with 200 iu pregnant mares' serum gonadotrophin (PMSG) administered 72 h before the device was withdrawn and eight injections of ovine FSH given at 12 h intervals starting at the time of PMSG administration. Oestrous behaviour began one day after CIDR device withdrawal (P\u00e8re David's deer: 24.00 \u00b1 2.32 h; red deer: 24.60 \u00b1 2.23 h). The duration of oestrus was greater in P\u00e8re David's deer than in red deer (17.50 \u00b1 1.43 h and 8.25 \u00b1 3.25 h, respectively, P&lt;0.001). The peak LH surge of P\u00e8re David's deer was 68.65 \u00b1 4.74 ng ml\u22121 occurring 29.00 \u00b1 2.41 h after removal of the CIDR devices. In comparison, the peak LH surge in red deer was 17.09 \u00b1 3.64 ng ml\u22121 (P&lt;0.001), occurring 24.00 \u00b1 0.00 h after CIDR device withdrawal. Pre-surge concentrations of LH were also greater (P&lt;0.001) in P\u00e8re David's deer (1.37 \u00b1 0.11 ng ml\u22121) than in red deer hinds (0.41 \u00b1 0.02 ng ml\u22121). Oestradiol concentrations increased steadily during FSH treatment in both species and reached a maximum of 15.60 \u00b1 2.22 pg ml\u22121 at 21.00 \u00b1 6.20 h after CIDR device withdrawal in P\u00e8re David's deer and 26.14 \u00b1 6.20 pg ml\u22121 at 20.40 \u00b1 7.30 h before CIDR device removal in red deer. The mean number of ovulations recorded was 3.83 \u00b1 1.22 (range 1\u20138) in P\u00e8re David's deer and 10.80 \u00b1 3.78 (range 4\u201323) in red deer. In Expt 2, six P\u00e8re David's deer and six red deer were superovulated with an identical regimen to that described for Expt 1. All hinds were inseminated in utero 36 h after CIDR device withdrawal with 25 \u00d7 106 frozen\u2013thawed P\u00e8re David's deer spermatozoa. Embryos were recovered by laparotomy 5, 6 and 7 days after insemination. A total of six embryos (three P\u00e8re David's deer \u00d7 red deer and three P\u00e8re David's deer \u00d7 P\u00e8re David's deer) were collected. One pregnancy was confirmed following the transfer of all embryos to synchronized red deer recipients. This pregnancy was terminated naturally between days 70 and 78. This is the first report of an interspecific transfer of hybrid embryos in a cervid and of the comparative superovulation response in two related species. The results indicate that treatment with PMSG and ovine FSH can be used in embryo transfer programmes for these species. However, in this study there were low inter-specific fertilization rates and transferred hybrid embryos failed to develop to term.<\/jats:p>","DOI":"10.1530\/jrf.0.1000629","type":"journal-article","created":{"date-parts":[[2004,3,20]],"date-time":"2004-03-20T01:55:52Z","timestamp":1079747752000},"page":"629-636","update-policy":"https:\/\/doi.org\/10.1530\/rep\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":21,"title":["Superovulation in red deer (\n Cervus elaphus<\/i>\n ) and P\u00e8re David's deer (\n Elaphurus davidianus<\/i>\n ), and fertilization rates following artificial insemination with P\u00e8re David's deer semen"],"prefix":"10.1093","volume":"100","author":[{"given":"C. McG.","family":"Argo","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"H. N.","family":"Jabbour","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"P. J.","family":"Goddard","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"R.","family":"Webb","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A. S. I.","family":"Loudon","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[1994,3,1]]},"container-title":["Reproduction"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/academic.oup.com\/reproduction\/article-pdf\/100\/2\/629\/64816048\/jrf_100_2_042.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/academic.oup.com\/reproduction\/article-pdf\/100\/2\/629\/64816048\/jrf_100_2_042.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,1,7]],"date-time":"2026-01-07T19:08:19Z","timestamp":1767812899000},"score":1,"resource":{"primary":{"URL":"https:\/\/academic.oup.com\/reproduction\/article\/100\/2\/629\/8278149"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1994,3,1]]},"references-count":0,"journal-issue":{"issue":"2","published-print":{"date-parts":[[1994,3,1]]}},"URL":"https:\/\/doi.org\/10.1530\/jrf.0.1000629","relation":{},"ISSN":["1470-1626","1741-7899"],"issn-type":[{"value":"1470-1626","type":"print"},{"value":"1741-7899","type":"electronic"}],"subject":[],"published-other":{"date-parts":[[1994,3,1]]},"published":{"date-parts":[[1994,3,1]]}}}