Effects of two estradiol esters (benzoate and cypionate) on the induction of synchronized ovulations in Bos indicus cows submitted to a timed artificial insemination protocol

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dc.contributor.authorSales, J. N. S.
dc.contributor.authorCarvalho, J. B. P.
dc.contributor.authorCrepaldi, G. A.
dc.contributor.authorCipriano, R. S. [UNESP]
dc.contributor.authorJacomini, J. O.
dc.contributor.authorMaio, J. R. G.
dc.contributor.authorSouza, J. C.
dc.contributor.authorNogueira, Guilherme de Paula [UNESP]
dc.contributor.authorBaruselli, P. S.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionAgência Paulista de Tecnologia dos Agronegócios (APTA)
dc.contributor.institutionOuro Fino Saúde Anim
dc.contributor.institutionUniversidade Federal de Lavras (UFLA)
dc.contributor.institutionUniversidade Federal da Paraíba (UFPB)
dc.date.accessioned2013-09-30T18:25:16Z
dc.date.accessioned2014-05-20T13:42:37Z
dc.date.available2013-09-30T18:25:16Z
dc.date.available2014-05-20T13:42:37Z
dc.date.issued2012-08-01
dc.description.abstractThe effects of estradiol benzoate (EB) and estradiol cypionate (EC) on induction of ovulation after a synchronized LH surge and on fertility of Bos indicus females submitted to timed AI (TAI) were evaluated. In Experiment 1, ovariectomized Nelore heifers were used to evaluate the effect of EB (n = 5) and EC (n = 5) on the circulating LH profile. The LH surge timing (19.6 and 50.5 h; P = 0.001), magnitude (20.5 and 9.4 ng/mL; P = 0.005), duration (8.6 and 16.5 h; P = 0.001), and area under the LH curve (158.6 and 339.4 ng/mL; P = 0.01) differed between the EB and EC treatments, respectively. In Experiment 2 (follicular responses; n = 60) and 3 (pregnancy per AI; P/AI; n = 953) suckled Bos indicus beef cows submitted to an estradiol/progesterone-based synchronization protocol were assigned to receive one of two treatments to induce synchronized ovulation: 1 mg of EB im 24 h after progesterone (P4) device removal or 1 mg of EC im at P4 device removal. There was no difference (P > 0.05) between EB and EC treatments on follicular responses (maximum diameter of the ovulatory follicle, 13.1 vs. 13.9 mm; interval from progesterone device removal to ovulation, 70.2 vs. 68.5 h; and ovulation rate, 77.8 vs. 82.8%, respectively). In addition, P/AI was similar (P < 0.22) between the cows treated with EB (57.5%; 277/482) and EC (61.8%; 291/471). In conclusion, despite pharmacologic differences, both esters of estradiol administered either at P4 device removal (EC) or 24 h later (EB) were effective in inducing an LH surge which resulted in synchronized ovulations and similar P/AI in suckled Bos indicus beef cows submitted to TAI. (C) 2012 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv São Paulo, FMVZ, Dept Anim Reprod, BR-09500900 São Paulo, Brazil
dc.description.affiliationAPTA Vale Paraiba Reg Ctr, Pindamonhangaba, SP, Brazil
dc.description.affiliationOuro Fino Saúde Anim, Ribeirao Preto, SP, Brazil
dc.description.affiliationUNESP, Dept Support Anim Prod & Hlth, Aracatuba, SP, Brazil
dc.description.affiliationUniversidade Federal de Lavras (UFLA), Dept Anim Sci, Lavras, MG, Brazil
dc.description.affiliationUFPB, Ctr Vet Sci, Areia, PB, Brazil
dc.description.affiliationUnespUNESP, Dept Support Anim Prod & Hlth, Aracatuba, SP, Brazil
dc.description.sponsorshipOurofino Agronegocio (Cravinhos, SP, Brazil)
dc.description.sponsorshipRG Genetica Avancada (Agua Boa, MS, Brazil)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.format.extent510-516
dc.identifierhttp://dx.doi.org/10.1016/j.theriogenology.2012.02.031
dc.identifier.citationTheriogenology. New York: Elsevier B.V., v. 78, n. 3, p. 510-516, 2012.
dc.identifier.doi10.1016/j.theriogenology.2012.02.031
dc.identifier.fileWOS000306538100005.pdf
dc.identifier.issn0093-691X
dc.identifier.lattes6926188473133379
dc.identifier.urihttp://hdl.handle.net/11449/14820
dc.identifier.wosWOS:000306538100005
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofTheriogenology
dc.relation.ispartofjcr2.136
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectBovineen
dc.subjectOvarian responseen
dc.subjectEstradiolen
dc.subjectTaien
dc.subjectLHen
dc.subjectSynchronizationen
dc.titleEffects of two estradiol esters (benzoate and cypionate) on the induction of synchronized ovulations in Bos indicus cows submitted to a timed artificial insemination protocolen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes6926188473133379
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Medicina Veterinária, Araçatubapt

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