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dc.contributor.authorBittar, J. H. J.-
dc.contributor.authorPinedo, P. J.-
dc.contributor.authorRisco, C. A.-
dc.contributor.authorSantos, J. E. P.-
dc.contributor.authorThatcher, W. W.-
dc.contributor.authorHencken, K. E.-
dc.contributor.authorCroyle, S.-
dc.contributor.authorGobikrushanth, M.-
dc.contributor.authorBarbosa, C. C.-
dc.contributor.authorVieira-Neto, A.-
dc.contributor.authorGalvao, K. N.-
dc.date.accessioned2014-12-03T13:08:56Z-
dc.date.accessioned2016-10-25T20:09:37Z-
dc.date.available2014-12-03T13:08:56Z-
dc.date.available2016-10-25T20:09:37Z-
dc.date.issued2014-06-01-
dc.identifierhttp://dx.doi.org/10.3168/jds.2013-7533-
dc.identifier.citationJournal Of Dairy Science. New York: Elsevier Science Inc, v. 97, n. 6, p. 3558-3569, 2014.-
dc.identifier.issn0022-0302-
dc.identifier.urihttp://hdl.handle.net/11449/111742-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/111742-
dc.description.abstractThe objective of the current study was to evaluate the effect of GnRH early postpartum on induction of ovulation, uterine health, and fertility in dairy cows. Holstein cows without a corpus luteum (CL) at 17 +/- 3 DIM were assigned randomly to receive i.m. GnRH (n = 245) at 17 +/- 3 and 20 +/- 3 DIM or remain as controls (n = 245). Ovaries were scanned by ultrasonography twice weekly totaling 4 examinations. Ovulation was characterized by the appearance of a CL >= 20 mm at any ultrasound or CL <20 mm in 2 consecutive examinations. Clinical and cytological endometritis were diagnosed at 35 DIM. Compared with control, GnRH increased ovulation up to 3.5 d after the last treatment (78.7 vs. 45.0%) and did not affect the prevalence of clinical endometritis (23.9 vs. 18.6%) or cytological endometritis (30.9 vs. 32.8%). Prevalence of clinical endometritis increased in cows that had calving problems (32.6 vs. 15.9%) and metritis (40.6 vs. 15.8%). Metritis increased prevalence of cytological endometritis (50.7 vs. 23.5%). Treatment with GnRH did not affect pregnancy per artificial insemination at 32 (37.6 vs. 38.6%) or 74 d after artificial insemination (35.0 vs. 31.5%), but reduced pregnancy loss (6.8 vs. 18.1%). No overall effect of GnRH treatment on hazard of pregnancy was observed; however, an interaction between GnRH treatment and ovulation showed that GnRH-treated cows that ovulated had increased hazard of pregnancy by 300 DIM compared with GnRH-treated and control cows that did not ovulate (hazard ratio = 2.0 and 1.3, respectively), but similar to control cows that ovulated (hazard ratio = 1.1). Gonadotropin-releasing hormone early postpartiim induced ovulation without affecting uterine health, but failed to improve pregnancy per artificial insemination or time to pregnancy, although it reduced pregnancy loss.en
dc.description.sponsorshipCollege of Veterinary Medicine at University of Florida-
dc.description.sponsorshipMilk Check-Off program-
dc.format.extent3558-3569-
dc.language.isoeng-
dc.publisherElsevier B.V.-
dc.sourceWeb of Science-
dc.subjectdairy cowen
dc.subjectovulation postpartumen
dc.subjectGnRHen
dc.subjectuterine healthen
dc.subjectfertilityen
dc.titleInducing ovulation early postpartum influences uterine health and fertility in dairy cowsen
dc.typeoutro-
dc.contributor.institutionUniv Florida-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionUniv Estado Santa Catarina-
dc.description.affiliationUniv Florida, Coll Vet Med, Dept Large Anim Clin Sci, Gainesville, FL 32610 USA-
dc.description.affiliationUniv Florida, Coll Agr & Life Sci, Dept Anim Sci, Gainesville, FL 32610 USA-
dc.description.affiliationUniv Estadual Paulista, Fac Med Vet & Zootecnia, BR-88520 Botucatu, SP, Brazil-
dc.description.affiliationUniv Estado Santa Catarina, Ctr Ciencias Agrovet, Dept Vet Med, BR-18618 Lages, SC, Brazil-
dc.description.affiliationUniv Florida, DH Barron Reprod & Perinatal Biol Res Program, Gainesville, FL 32610 USA-
dc.description.affiliationUnespUniv Estadual Paulista, Fac Med Vet & Zootecnia, BR-88520 Botucatu, SP, Brazil-
dc.identifier.doi10.3168/jds.2013-7533-
dc.identifier.wosWOS:000336192100031-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofJournal of Dairy Science-
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