Increasing pregnancy rates at first service in dairy cows exposed to high ambient temperatures before and after calving

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dc.contributor.author Cartmill, J. A.
dc.contributor.author Rozell, Timothy G.
dc.contributor.author El-Zarkouny, S. Z.
dc.contributor.author Smith, J. F.
dc.contributor.author Stevenson, Jeffrey S.
dc.date.accessioned 2011-08-02T21:25:54Z
dc.date.available 2011-08-02T21:25:54Z
dc.date.issued 2011-08-02
dc.identifier.uri http://hdl.handle.net/2097/11945
dc.description.abstract Cows exposed to heat stress before or after calving or both are prone to reduced fertility because of reduced expression of estrus and less embryonic survival if pregnant. Cows calving on three dairy farms during the summer of 1998 were studied. First inseminations were programmed to occur between 50 and 70 days in milk using the Ovsynch protocol, which included a timed artificial insemination. Control cows were treated similarly but did not receive the second injection of gonadotropin-releasing hormone and were inseminated only after estrus was detected (Select Synch). The Ovsynch protocol increased pregnancy rates from 17.6 to 31.3%, because AI submission rates were 100% and conception rates were not different from those of control (Select Synch) cows. 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 Heat stress en_US
dc.subject Estrus en_US
dc.title Increasing pregnancy rates at first service in dairy cows exposed to high ambient temperatures before and after calving en_US
dc.type Conference paper en_US
dc.date.published 1999 en_US
dc.citation.epage 77 en_US
dc.citation.spage 75 en_US
dc.contributor.authoreid trozell en_US
dc.contributor.authoreid jfsmith en_US
dc.contributor.authoreid jss en_US

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