Estrus detection, first service conception, and embryonic death in beef heifers synchronized with MGA and prostaglandin

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dc.contributor.author Lamb, G.C.
dc.contributor.author Miller, B.L.
dc.contributor.author Traffas, V.
dc.contributor.author Corah, L.R.
dc.date.accessioned 2010-09-02T21:12:40Z
dc.date.available 2010-09-02T21:12:40Z
dc.date.issued 2010-09-02T21:12:40Z
dc.identifier.uri http://hdl.handle.net/2097/4831
dc.description.abstract In April, 1996, 1501 yearling crossbred heifers located on seven different ranches were estrus-synchronized and artificially inseminated (AI) 12 hours after they were detected in estrus. Herd size ranged from 82 to 43 9 head. Of the 1501 heifers, 86.1% were detected in estrus. First service conception rates of those 1292 heifers averaged 58.4% (40.3 to 68.8%). In three herds, ultrasonography was used to diagnose 525 heifers as pregnant at 30 days after AI. At 60 to 90 days after the breeding season, palpation of the uterus confirmed that embryonic death had occurred in 4.2% (4.0 to 4.8%). First service conception rates varied widely among ranches. The variation might have been due to factors such as climate, average daily gain, body condition, A I technician, and AI sire. A small percentage of embryos died after the 30-day ultrasound exam regardless of the ranch or management system. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Cattlemen’s Day, 1997 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 97-309-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783 en_US
dc.subject Beef en_US
dc.subject Artificial insemination en_US
dc.subject Synchronization en_US
dc.subject Ultrasound en_US
dc.subject Conception en_US
dc.subject Embryonic death en_US
dc.title Estrus detection, first service conception, and embryonic death in beef heifers synchronized with MGA and prostaglandin en_US
dc.type Conference paper en_US
dc.date.published 1997 en_US
dc.citation.epage 99 en_US
dc.citation.spage 98 en_US
dc.description.conference Cattlemen's Day, 1997, Kansas State University, Manhattan, KS, March 7, 1997 en_US

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