Presynchronization of estrous cycles in dairy cows before ovsynch + CIDR and resynchronization of repeat estrus using the CIDR

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dc.contributor.author El-Zarkouny, S.Z.
dc.contributor.author Cartmill, J.A.
dc.contributor.author Richardson, A.M.
dc.contributor.author Medina-Britos, M.A.
dc.contributor.author Hensley, B.A.
dc.contributor.author Stevenson, Jeffrey S.
dc.date.accessioned 2010-12-10T17:36:11Z
dc.date.available 2010-12-10T17:36:11Z
dc.date.issued 2010-12-10
dc.identifier.uri http://hdl.handle.net/2097/6871
dc.description.abstract Postpartum anestrus is one of the major limitations to achieving acceptable pregnancy rates. The Ovsynch protocol is an excellent tool to improve reproductive efficiency of dairy cows because it can induce estrous cycles in anestrous cows. In the first experiment, administering two PGF2" injections to lactating dairy cows 14 days apart with the second injection given 12 days before the Ovsynch protocol increased (P<0.05) pregnancy rate by 10 percentage points in cycling and noncycling cows. Inserting a progesterone-releasing insert (CIDR) for 7 days during the Ovsynch protocol did not further increase pregnancy rates. In a second experiment, a resynchronization treatment consisting of a used CIDR inserted for 7 days from days 13 to 20 after insemination increased (P<0.05) embryo survival from day 30 to 58 by 11 percentage points but failed to increase overall rate of return to estrus and conception rate at the second AI (first eligible estrus after first AI). en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Dairy Day, 2001 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 02-133-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 881 en_US
dc.subject Dairy en_US
dc.subject Ovsynch en_US
dc.subject Presynch en_US
dc.subject Pregnancy rates en_US
dc.title Presynchronization of estrous cycles in dairy cows before ovsynch + CIDR and resynchronization of repeat estrus using the CIDR en_US
dc.type Conference paper en_US
dc.date.published 2001 en_US
dc.citation.epage 54 en_US
dc.citation.spage 52 en_US
dc.description.conference Dairy Day, 2001, Kansas State University, Manhattan, KS, 2001
dc.contributor.authoreid jss en_US


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