Times artifical insemination conception rates in response to a progesterone insert in lactating dairy cows

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dc.contributor.author Martel, C.A
dc.contributor.author Buttery, B.S.
dc.contributor.author Burns, M.G.
dc.contributor.author Brown, W.E.
dc.contributor.author Stevenson, Jeffrey S.
dc.date.accessioned 2010-11-29T17:56:10Z
dc.date.available 2010-11-29T17:56:10Z
dc.date.issued 2010-11-29
dc.identifier.uri http://hdl.handle.net/2097/6672
dc.description Dairy Research, 2007 is known as Dairy Day, 2007 en
dc.description.abstract Our objective was to determine the effectiveness of exogenous progesterone in the form of an intravaginal insert (controlled internal drug release, CIDR) in conjunction with an ovulation synchronization protocol in lactating dairy cows. Cows received a Presynch protocol (two injections of prostaglandin F2α [PGF2α] 14 days apart) beginning 30 and 36 days in milk, respectively, in two herds. Cows were inseminated after the second Presynch injection when estrus was detected. Remaining cows were treated with the Ovsynch protocol, and alternate cows were assigned randomly to receive a progesterone insert(CIDR). Blood was collected, and body condition scores (BCS) were assigned to treated cows. Pregnancy status was confirmed by palpation on day 38 post timed AI (TAI) and verified again 4 weeks later. Progesterone increased conception rates in treated cows when compared with controls (38 vs. 24%), but did not differ from early inseminated cows(38%). Pregnancy loss was numerically less in progesterone-treated cows than in controls(4.4 vs. 11.8%). en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Dairy Day, 2007 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 08-127-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 984 en_US
dc.subject Dairy en_US
dc.subject CIDR en_US
dc.subject Ovsynch en_US
dc.subject GnRH en_US
dc.subject PGF2α en_US
dc.title Times artifical insemination conception rates in response to a progesterone insert in lactating dairy cows en_US
dc.type Conference paper en_US
dc.date.published 2007 en_US
dc.citation.epage 33 en_US
dc.citation.spage 30 en_US
dc.contributor.authoreid jss en_US

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