Managing the dominant follicle in lactating dairy cows

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dc.contributor.authorWiltbank, M. C.
dc.contributor.authorSartori, R.
dc.contributor.authorHerlihy, M. M.
dc.contributor.authorVasconcelos, José Luiz Moraes [UNESP]
dc.contributor.authorNascimento, A. B.
dc.contributor.authorSouza, A. H.
dc.contributor.authorAyres, H.
dc.contributor.authorCunha, A. P.
dc.contributor.authorKeskin, A.
dc.contributor.authorGuenther, J. N.
dc.contributor.authorGumen, A.
dc.contributor.institutionUniv Wisconsin
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionTEAGASC
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUludag Univ
dc.date.accessioned2013-09-30T18:27:50Z
dc.date.accessioned2014-05-20T13:41:20Z
dc.date.available2013-09-30T18:27:50Z
dc.date.available2014-05-20T13:41:20Z
dc.date.issued2011-12-01
dc.description.abstractReproductive efficiency is not optimal in high-producing dairy cows. Although many aspects of ovarian follicular growth in cows are similar to those observed in heifers, there are numerous specific differences in follicular development that may be linked with changes in reproductive physiology in high-producing lactating dairy cows. These include: I) reduced circulating estradiol (E2) concentrations near estrus, 2) ovulation of follicles that are larger than the optimal size, 3) increased double ovulation and twinning, and 4) increased incidence of anovulation with a distinctive pattern of follicle growth in anovular dairy cows. The first three changes become more dramatic as milk production increases, although anovulation has not generally been associated with level of milk production. To overcome reproductive inefficiencies in dairy cows, reproductive management programs have been developed to synchronize ovulation and enable the use of timed AI in lactating dairy cows. Effective regulation of the CL, follicles, and hormonal environment during each part of the protocol is critical for optimizing these programs. This review discusses the distinct aspects of follicular development in lactating dairy cows and the methodologies that have been utilized in the past two decades in order to manage the dominant follicle during synchronization of ovulation and timed AI programs. (C) 2011 Published by Elsevier B.V.en
dc.description.affiliationUniv Wisconsin, Dept Dairy Sci, Madison, WI 53706 USA
dc.description.affiliationUniv São Paulo, Dept Anim Sci, BR-09500900 São Paulo, Brazil
dc.description.affiliationTEAGASC, Anim & Grassland Res & Innovat Ctr, Anim & Biosci Res Dept, Moorepark, Ireland
dc.description.affiliationUniv Estadual Paulista, Dept Anim Prod, São Paulo, Brazil
dc.description.affiliationUniv São Paulo, FMVZ, Dept Anim Reprod, BR-09500900 São Paulo, Brazil
dc.description.affiliationUludag Univ, Dept Obstet & Gynecol, Bursa, Turkey
dc.description.affiliationUnespUniv Estadual Paulista, Dept Anim Prod, São Paulo, Brazil
dc.format.extent1568-1582
dc.identifierhttp://dx.doi.org/10.1016/j.theriogenology.2011.08.012
dc.identifier.citationTheriogenology. New York: Elsevier B.V., v. 76, n. 9, p. 1568-1582, 2011.
dc.identifier.doi10.1016/j.theriogenology.2011.08.012
dc.identifier.issn0093-691X
dc.identifier.lattes1069922096621313
dc.identifier.urihttp://hdl.handle.net/11449/14335
dc.identifier.wosWOS:000297232900002
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofTheriogenology
dc.relation.ispartofjcr2.136
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectFollicleen
dc.subjectDairy cattleen
dc.subjectOvsynchen
dc.subjectSynchronization of ovulationen
dc.subjectTimed AIen
dc.titleManaging the dominant follicle in lactating dairy cowsen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes1069922096621313
unesp.author.orcid0000-0001-6324-3614[4]
unesp.author.orcid0000-0001-6917-0057[2]
unesp.author.orcid0000-0003-3586-3036[5]
unesp.author.orcid0000-0001-8188-0991[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Medicina Veterinária e Zootecnia, Botucatupt

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