Long-term CIDR program for synchronization of estrus in beef heifers produces acceptable AI pregnancy rates

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dc.contributor.author Johnson, Sandra K.
dc.contributor.author Bolte, J.W.
dc.contributor.author Jaeger, John R.
dc.date.accessioned 2011-03-30T16:45:07Z
dc.date.available 2011-03-30T16:45:07Z
dc.date.issued 2011-03-30
dc.identifier.uri http://hdl.handle.net/2097/8115
dc.description.abstract Routinely achieving pregnancy rates greater than 50% with fixed-time artificial insemination (AI) in heifers has been difficult. The Beef Reproduction Task Force recently added the intravaginal progesterone-releasing device (CIDR)-Select to its list of recommended fixed-time AI protocols. Research and field trials in Missouri have achieved AI pregnancy rates in the range of 55% to 60%. Another relatively new protocol is the 5-day CO-Synch, a timed AI protocol + CIDR that has produced pregnancy rates similar to or higher than those obtained with the standard 7-day CO-Synch + CIDR protocol. It is not known whether these two systems differ in terms of estrous response. The objective of the current study was to compare effects of a long-term, 14-day CIDR-Select protocol and a 5-day CO-Synch + CIDR protocol on estrous distribution and AI pregnancy rate in yearling beef heifers. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Cattlemen’s Day, 2010 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 10-170-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 1029 en_US
dc.relation.isPartOf Beef Cattle Research, 2010 is known as Cattlemen’s Day, 2010 en_US
dc.subject Beef en_US
dc.subject CIDR en_US
dc.subject Estrus en_US
dc.subject Heifers en_US
dc.subject AI en_US
dc.subject Pregnancy rates en_US
dc.title Long-term CIDR program for synchronization of estrus in beef heifers produces acceptable AI pregnancy rates en_US
dc.type Conference paper en_US
dc.date.published 2010 en_US
dc.citation.epage 38 en_US
dc.citation.spage 36 en_US
dc.description.conference Cattlemen's Day, 2010, Kansas State University, Manhattan, KS, March 5, 2010 en_US
dc.contributor.authoreid sandyj en_US
dc.contributor.authoreid jrjaeger en_US
dc.contributor.authoreid bolte2 en_US

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