Colour Doppler Ultrasonography as a Tool to Assess Luteal Function in Santa Ines Ewes

dc.contributor.authorFigueira, L. M.
dc.contributor.authorFonseca, J. F.
dc.contributor.authorArashiro, E. K. N.
dc.contributor.authorSouza-Fabjan, J. M. G.
dc.contributor.authorRibeiro, A. C. S.
dc.contributor.authorOba, E. [UNESP]
dc.contributor.authorViana, J. H. M.
dc.contributor.authorBrandao, F. Z.
dc.contributor.institutionUniversidade Federal Fluminense (UFF)
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.description.abstractContents The aim of this study was to evaluate luteal dynamics in the Santa Ines ewes using colour Doppler (CD) ultrasonography. Oestrus was synchronized in nulliparous females (n=18), and subsequently, they were only teased (n=6) or teased and mated (n=12). Blood samples were collected daily for plasma progesterone (P-4) concentrations. Ultrasonographic images of corpora lutea (CL) in CD mode were obtained for further analysis in its largest diameter. The CD mode allowed an early sequential monitoring of CL that was visualized by the first time 0.77 +/- 0.62days after ovulation, with luteal area 29.68 +/- 13.21mm(2). During the luteogenesis, a progressive increase was observed, followed by a plateau of luteal area, vascularization area and plasma concentrations of P-4 reaching maximum values in D11 (124.0 +/- 38.0mm(2), 52.78 +/- 24.08mm(2) and 11.23 +/- 4.89ng/ml, respectively). In the luteolysis, the plasma concentrations of P-4 decreased sharply, whereas luteal and vascularization area gradually. The vascularization area was positively correlated with plasma concentrations of P-4 during the luteogenesis (r=0.22) and luteolysis (r=0.48). The luteal dynamics of Santa Ines ewes showed patterns similar to those observed in other sheep breeds studied. The CD ultrasonography has the potential to be used as a tool to assess luteal function in sheep.en
dc.description.affiliationUniv Fed Fluminense, BR-24230340 Niteroi, RJ, Brazil
dc.description.affiliationEmbrapa Caprinos & Ovinos, Sobral, Ce, Brazil
dc.description.affiliationEmbrapa Gado Leite, Juiz De Fora, MG, Brazil
dc.description.affiliationUniv Estadual Paulista, Botucatu, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Botucatu, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)
dc.description.sponsorshipUniversidade Federal Fluminense/Proppi/Fopesq
dc.description.sponsorshipIdFAPERJ: E-26/102.963/2012
dc.identifier.citationReproduction In Domestic Animals. Hoboken: Wiley-blackwell, v. 50, n. 4, p. 643-650, 2015.
dc.relation.ispartofReproduction In Domestic Animals
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleColour Doppler Ultrasonography as a Tool to Assess Luteal Function in Santa Ines Ewesen