Long-term CIDR program for synchronization of estrus in beef heifers produces acceptable AI pregnancy rates
dc.citation.epage | 38 | en_US |
dc.citation.spage | 36 | en_US |
dc.contributor.author | Johnson, Sandra K. | |
dc.contributor.author | Bolte, J.W. | |
dc.contributor.author | Jaeger, John R. | |
dc.contributor.authoreid | sandyj | en_US |
dc.contributor.authoreid | jrjaeger | en_US |
dc.contributor.authoreid | bolte2 | en_US |
dc.date.accessioned | 2011-03-30T16:45:07Z | |
dc.date.available | 2011-03-30T16:45:07Z | |
dc.date.issued | 2011-03-30 | |
dc.date.published | 2010 | en_US |
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.description.conference | Cattlemen's Day, 2010, Kansas State University, Manhattan, KS, March 5, 2010 | en_US |
dc.identifier.uri | http://hdl.handle.net/2097/8115 | |
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 |