Is GnRH necessary at CIDR insertion using a 7-Day CIDR synchronization protocol for beef heifers?

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dc.contributor.author Eborn, D.R.
dc.contributor.author Blair, E.E.
dc.contributor.author Grieger, David M.
dc.date.accessioned 2011-03-30T16:50:19Z
dc.date.available 2011-03-30T16:50:19Z
dc.date.issued 2011-03-30
dc.identifier.uri http://hdl.handle.net/2097/8131
dc.description Beef Cattle Research, 2011 is known as Cattlemen’s Day, 2011 en
dc.description.abstract The EAZI-BREED CIDR is commonly used in estrous synchronization protocols for both beef heifers and cows. The label calls for insertion of a progesterone-impregnated controlled internal drug release (CIDR) for 7 consecutive days with an injection of prostaglandin F2α given a day before CIDR removal. Animals should display estrus 1 to 3 days after CIDR removal. Modifications to this protocol include administration of gonadotropin-releasing hormone (GnRH) at the time of CIDR insertion and administration of the prostaglandin injection at the time of CIDR removal on day 7. Use of GnRH in conjunction with a CIDR may improve estrous synchronization in beef cows and fertility at fixed-time insemination but may not be necessary when synchronizing beef heifers. Our objective was to compare heat response and fertility in heifers with or without GnRH administration at the time of CIDR insertion. Our hypothesis was that heifer fertility would be similar between treatments. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 11-171-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 1047 en_US
dc.relation.isPartOf Cattlemen’s Day, 2011 en_US
dc.subject Beef en_US
dc.subject GnRH en_US
dc.subject CIDR en_US
dc.subject Synchronization rate en_US
dc.title Is GnRH necessary at CIDR insertion using a 7-Day CIDR synchronization protocol for beef heifers? en_US
dc.type Conference paper en_US
dc.date.published 2011 en_US
dc.citation.epage 34 en_US
dc.citation.spage 32 en_US
dc.description.conference Cattlemen's Day, 2011, Kansas State University, Manhattan, KS, March 4, 2011 en_US
dc.contributor.authoreid dgrieger en_US

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