Gonadotropin-releasing hormone and conception of Holstein cows

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dc.contributor.author Stevenson, Jeffrey S.
dc.contributor.author Schmidt, M.K.
dc.contributor.author Call, Edward P.
dc.date.accessioned 2012-10-04T19:37:01Z
dc.date.available 2012-10-04T19:37:01Z
dc.date.issued 2012-10-04
dc.identifier.uri http://hdl.handle.net/2097/14812
dc.description.abstract To study the effects of gonadotropin-releasing hormone (GnRH) and timing of artificial insemination (Al) on fertility, 328 dairy cows were divided into four groups. Inseminations at first, second, or third service were done soon after detected estrus (0 hr) or 12 h later. One-half of the cows in each of the preceding groups received GnRH (100µg) or saline within 30 sec after AI. Conception at first service was not improved by GnRH. But conception rates at repeat services were improved by 21% when cows received GnRH after AI. Time of AI (0 vs 12 hr) had no effect on conception. Administering GnRH at repeat services should improve conception rate of lactating dairy cows. en_US
dc.publisher Kansas Agricultural Experiment Station en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 85-116-S en_US
dc.relation.isPartOf Report of progress (Kansas Agricultural Experiment Station); 460 en_US
dc.subject Dairy en_US
dc.subject Gonadotropin-releasing hormone (GnRH) en_US
dc.subject Conception rates en_US
dc.subject Artificial Insemination (AI) en_US
dc.title Gonadotropin-releasing hormone and conception of Holstein cows en_US
dc.type Conference paper en_US
dc.date.published 1984 en_US
dc.citation.epage 30 en_US
dc.citation.spage 29 en_US
dc.description.conference Dairy Day, 1984, Kansas State University, Manhattan, KS, 1984

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