Early postpartum hormonal therapy improves fertility of dairy cows

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dc.contributor.author Stevenson, Jeffrey S.
dc.contributor.author BenMrad, M.
dc.date.accessioned 2012-10-04T19:22:38Z
dc.date.available 2012-10-04T19:22:38Z
dc.date.issued 2012-10-04
dc.identifier.uri http://hdl.handle.net/2097/14785
dc.description.abstract A study of 234 Holstein cows was conducted to determine if hormonal treatments of gonadotropin-releasing hormone (GnRH or Cystorelin®) and(or) prostaglandin F2a (PGF or Lutalyse®) given early after calving would improve subsequent fertility of dairy cows. Treatment of cows having abnormal conditions associated with calving (puerperal problems) reduced interval from calving to conception by 43 to 48 days when GnRH was given once between days 10 and 14 postpartum or when PGF was administered once between 20 and 24 days after calving compared with cows given only saline (controls). The reduction in days open was 27 to 29 days overall for all cows (normal and abnormal) treated with either hormone compared with controls. Cows (normal and abnormal) given either hormone required 26 to 41 % fewer inseminations per conception than controls. Reasons for improved fertility are discussed. We conclude that early postpartum treatments with GnRH or PGF improved fertility of dairy cows, especially those that experienced puerperal problems. en_US
dc.publisher Kansas Agricultural Experiment Station en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 86-94-S en_US
dc.relation.isPartOf Report of progress (Kansas Agricultural Experiment Station); 484 en_US
dc.subject Dairy en_US
dc.subject Fertility en_US
dc.subject Gonadotropin-releasing hormone (GnRH) en_US
dc.subject Prostaglandin F2-alpha en_US
dc.subject Conception en_US
dc.title Early postpartum hormonal therapy improves fertility of dairy cows en_US
dc.type Conference paper en_US
dc.date.published 1985 en_US
dc.citation.epage 46 en_US
dc.citation.spage 44 en_US
dc.description.conference Dairy Day, 1985, Kansas State University, Manhattan, KS, 1985
dc.contributor.authoreid jss en_US


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