Follicular wave emergence in Santa Ines ewes subjected to long-term, progesterone-based estrous synchronization protocols at different times of the year

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dc.contributor.authorOliveira, M. E. F. [UNESP]
dc.contributor.authorAyres, H.
dc.contributor.authorOliveira, L. G. [UNESP]
dc.contributor.authorOba, E. [UNESP]
dc.contributor.authorKridli, R. T.
dc.contributor.authorBartlewski, P. M.
dc.contributor.authorFonseca, J. F.
dc.contributor.authorBicudo, S. D. [UNESP]
dc.contributor.authorVicente, W. R. R.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniv Guelph
dc.contributor.institutionJordan Univ Sci & Technol
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.date.accessioned2018-11-26T17:10:40Z
dc.date.available2018-11-26T17:10:40Z
dc.date.issued2016-11-01
dc.description.abstractThis study was conducted to document the pattern of antral follicular wave emergence throughout the 14-day, progesterone (P-4)-based estrous synchronization protocol in ewes that were maintained in subtropical conditions, during the period of increasing day lengths (ID), decreasing day lengths (DD), and the transitional period (TP). In addition, the influence of ovarian status (i.e., size of ovarian antral follicles and the presence of corpora lutea) at the outset of P-4 treatment on ensuing ovarian follicular wave development was examined. Sexually mature Santa Ines ewes (n =70) were subjected to one of the two estrous synchronization protocols in the three seasons. On Day 0, the ewes received an i.m. injection of prostaglandin F-2 alpha and an intravaginal P4-releasing device that remained in place for 14days (G-1CIDR) or was replaced on Day 7 (G-2CIDR). Daily ultrasonography of ovaries was conducted from Days 0 to 15. Mean (+/- SEM) numbers of follicular waves per ewe were 3.7 +/- 0.1 and 3.6 +/- 0.1 for G-1CIDR and G-2CIDR (P > 0.05). The number of emerging follicular waves was greater (P<0.05) during the ID period than during the TP and DD periods (4.0 +/- 0.1, 3.4 +/- 0.1 and 3.6 +/- 0.1, respectively). The presence of medium-sized antral follicles (4.0 to 5.75 mm) in the absence of corpora lutea at the time of CIDR insertion tended to advance follicular wave emergence. Although the long-term P-4 treatment was not originally designed to synchronize follicular waves, there was a distinctive pattern of follicular wave dynamics during the period of application of CIDRs that was affected mainly by the number of emerging follicular waves and ovarian status at CIDR insertion. (C) 2016 Elsevier B.V. All rights reserved.en
dc.description.affiliationSao Paulo State Univ, Coll Agr & Vet Sci, Dept Preventat Vet Med & Anim Reprod, Via Acesso Prof Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP, Brazil
dc.description.affiliationUniv Sao Paulo, Coll Vet Med & Anim Sci, Dept Anim Reprod, BR-05508270 Sao Paulo, SP, Brazil
dc.description.affiliationSao Paulo State Univ, Coll Agr & Vet Sci, Dept Clin & Vet Surg, BR-14884900 Jaboticabal, SP, Brazil
dc.description.affiliationSao Paulo State Univ, Fac Vet Med & Anim Sci, Dept Anim Reprod & Vet Radiol, BR-18618970 Botucatu, SP, Brazil
dc.description.affiliationUniv Guelph, Dept Biomed Sci, Guelph, ON, Canada
dc.description.affiliationJordan Univ Sci & Technol, Dept Anim Prod, Irbid, Jordan
dc.description.affiliationBrazilian Agr Res Corp Embrapa Goats & Sheep, BR-36155000 Coronel Pacheco, MG, Brazil
dc.description.affiliationUnespSao Paulo State Univ, Coll Agr & Vet Sci, Dept Preventat Vet Med & Anim Reprod, Via Acesso Prof Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP, Brazil
dc.description.affiliationUnespSao Paulo State Univ, Coll Agr & Vet Sci, Dept Clin & Vet Surg, BR-14884900 Jaboticabal, SP, Brazil
dc.description.affiliationUnespSao Paulo State Univ, Fac Vet Med & Anim Sci, Dept Anim Reprod & Vet Radiol, BR-18618970 Botucatu, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipJordan University of Science and Technology
dc.description.sponsorshipIdFAPESP: 2008/05503-2
dc.description.sponsorshipIdFAPESP: 2008/01665-8
dc.format.extent80-86
dc.identifierhttp://dx.doi.org/10.1016/j.anireprosci.2016.09.008
dc.identifier.citationAnimal Reproduction Science. Amsterdam: Elsevier Science Bv, v. 174, p. 80-86, 2016.
dc.identifier.doi10.1016/j.anireprosci.2016.09.008
dc.identifier.fileWOS000388062300011.pdf
dc.identifier.issn0378-4320
dc.identifier.urihttp://hdl.handle.net/11449/162170
dc.identifier.wosWOS:000388062300011
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofAnimal Reproduction Science
dc.relation.ispartofsjr0,704
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectEwe
dc.subjectFollicular dynamics
dc.subjectEstrus synchronization
dc.subjectProgesterone
dc.subjectSuperovulation
dc.titleFollicular wave emergence in Santa Ines ewes subjected to long-term, progesterone-based estrous synchronization protocols at different times of the yearen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.

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Artigos - Medicina Veterinária Preventiva e Reprodução Animal - FCAV
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