{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,3]],"date-time":"2026-10-03T00:36:17Z","timestamp":1790987777312,"version":"4.1.0"},"reference-count":9,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2021,6,6]],"date-time":"2021-06-06T00:00:00Z","timestamp":1622937600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100008530","name":"European Regional Development Fund","doi-asserted-by":"publisher","award":["N20016"],"award-info":[{"award-number":["N20016"]}],"id":[{"id":"10.13039\/501100008530","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Reprod Domestic Animals"],"published-print":{"date-parts":[[2021,8]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>While the global use of in vitro\u2010produced embryos in dairy cattle is on the rise, several technical aspects of embryo transfer procedures have not yet been optimized. This study compares the effects of inducing ovulation using human chorionic gonadotropin (hCG) versus gonadotropin\u2010releasing hormone (GnRH) at the end of a 5\u2010day progesterone(P4)\u2010based protocol for oestrous synchronization on the pregnancy rate of lactating dairy cow recipients of in vitro\u2010produced embryos. Fresh embryos were transferred on Day\u2010seven post\u2010oestrus to ovulating cows receiving GnRH or hCG (groups GnRH and hCG, <jats:italic>n<\/jats:italic>\u00a0=\u00a060 each). Pregnancy was diagnosed by ultrasound on Day 28 post\u2010oestrus. Forty\u2010nine cows became pregnant: 16 in GnRH (26.7%) and 33 in hCG (55%). Taking GnRH\u2010treated cows as reference, the odds ratio for pregnancy of hCG\u2010treated cows was 3.3 (<jats:italic>p<\/jats:italic>\u00a0=\u00a0.002). In conclusion, hCG treatment given at the end of a 5\u2010day P4\u2010based protocol for oestrous synchronization improved the pregnancy rate in lactating dairy cows receiving an in vitro\u2010produced embryo.<\/jats:p>","DOI":"10.1111\/rda.13971","type":"journal-article","created":{"date-parts":[[2021,5,26]],"date-time":"2021-05-26T15:49:29Z","timestamp":1622044169000},"page":"1145-1147","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Inducing ovulation with human chorionic gonadotrophin improves the pregnancy rate in lactating dairy cows receiving an in vitro\u2010produced embryo"],"prefix":"10.1111","volume":"56","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6404-1248","authenticated-orcid":false,"given":"Irina","family":"Garcia\u2010Ispierto","sequence":"first","affiliation":[{"name":"Animal Science University of Lleida Lleida Spain"},{"name":"Agrotecnio Centre Lleida Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M\u00f2nica","family":"Llobera\u2010Balcells","sequence":"additional","affiliation":[{"name":"Animal Science University of Lleida Lleida Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1413-3862","authenticated-orcid":false,"given":"Fernando","family":"L\u00f3pez\u2010Gatius","sequence":"additional","affiliation":[{"name":"Agrotecnio Centre Lleida Spain"},{"name":"Transfer in Bovine Reproduction SLu Barbastro Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2021,6,6]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1071\/RD07204"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.theriogenology.2015.04.021"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.theriogenology.2009.11.027"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1262\/jrd.2014-063"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1093\/jas\/skaa288"},{"key":"e_1_2_9_7_1","volume-title":"Applied logistic regression","author":"Hosmer D. 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