Follicular development and reproductive hormone changes during postpartum anestrus in suckled beef cows

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dc.contributor.author Perry, R.C.
dc.contributor.author Corah, L.R.
dc.contributor.author Beal, W.E.
dc.contributor.author Kiracofe, G.H.
dc.contributor.author Minton, J. Ernest
dc.contributor.author Cochran, R.C.
dc.contributor.author Brethour, J.R.
dc.contributor.author Stevenson, Jeffrey S.
dc.date.accessioned 2010-10-20T17:02:32Z
dc.date.available 2010-10-20T17:02:32Z
dc.date.issued 2010-10-20T17:02:32Z
dc.identifier.uri http://hdl.handle.net/2097/6379
dc.description.abstract Twenty-six, Hereford × Angus, suckled cows were utilized to determine patterns of follicular development and associated changes in reproductive hormones during postpartum anestrus and first estrous cycles. Ultrasonography per rectum was used to monitor follicular size and detect ovulation. Dietary energy and(or) body condition influenced patterns of follicular development during postpartum anestrus. Follicular growth occurred in waves during this period in cows that were in adequate body condition and adequately fed, and follicular development appeared to be related to serum concentrations of luteinizing hormone and estradiol. Two distinct characteristics were associated with follicular development before the first postpartum ovulation. First, diameter of dominant follicles increased with successive follicular waves. Second, a large dominant follicle was present for an extended time before development of the first ovulatory follicle and appeared to be involved in the mechanism that initiates the first ovulation after calving. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Cattlemen’s Day, 1991 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 91-355-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 623 en_US
dc.subject Beef en_US
dc.subject Cattle en_US
dc.subject Postpartum en_US
dc.subject Ovarian follicles en_US
dc.subject Ultrasonography en_US
dc.title Follicular development and reproductive hormone changes during postpartum anestrus in suckled beef cows en_US
dc.type Conference paper en_US
dc.date.published 1991 en_US
dc.citation.epage 28 en_US
dc.citation.spage 26 en_US
dc.description.conference Cattlemen's Day, 1991, Kansas State University, Manhattan, KS, March 1, 1991 en_US
dc.contributor.authoreid jss en_US
dc.contributor.authoreid eminton en_US
dc.contributor.ORCID orcid.org/0000-0002-9150-169X


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