Pregnancy rates in dairy cattle after three different, timed, breeding protocols

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dc.contributor.author Cartmill, J. A.
dc.contributor.author El-Zarkouny, S. Z.
dc.contributor.author Lamb, G. C.
dc.contributor.author Stevenson, Jeffrey S.
dc.date.accessioned 2011-08-02T21:23:48Z
dc.date.available 2011-08-02T21:23:48Z
dc.date.issued 2011-08-02
dc.identifier.uri http://hdl.handle.net/2097/11937
dc.description.abstract Synchronizing ovulation enables dairy producers to inseminate cows by appointment rather than after detected estrus. Three different, timed artificial insemination protocols using different combinations of prostaglandin F2alpha and gonadotropin-releasing hormone were used to synchronize ovulation in 702 lactating Holstein cows. Cyclicity, pregnancy rate, and embryonic survival rate from each treatment were compared. Our results indicate that all three treatments produced acceptable pregnancy rates in first lactation cows. However, for cows in their second or greater lactation, the treatment using prostaglandin F2alpha 12 days before the Ovsynch protocol improved pregnancy rates more than the other two. en_US
dc.publisher Kansas Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Dairy Day, 1999 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 00-136-S en_US
dc.relation.isPartOf Report of progress (Kansas Agricultural Experiment Station and Cooperative Extension Service); 842 en_US
dc.subject Dairy en_US
dc.subject Ovsynch protocol en_US
dc.subject Pregnancy rates en_US
dc.subject Timed a.i. en_US
dc.title Pregnancy rates in dairy cattle after three different, timed, breeding protocols en_US
dc.type Conference paper en_US
dc.date.published 1999 en_US
dc.citation.epage 72 en_US
dc.citation.spage 70 en_US
dc.description.conference Dairy Day, 1999, Kansas State University, Manhattan, KS, 1999
dc.contributor.authoreid jss en_US


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