Occurrence of premature regression of corpus luteum in MOET programs in Dorper ewes under subtropical climate

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dc.contributor.authorRocha, Marcela S.
dc.contributor.authorMaia, Ana Lucia R.S.
dc.contributor.authorRangel, Paulo Sérgio C.
dc.contributor.authorOliveira, Maria Emilia F. [UNESP]
dc.contributor.authorFonseca, Jeferson F.
dc.contributor.authorOliveira, Cláudio A.
dc.contributor.authorSouza-Fabjan, Joanna M.G.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Federal Fluminense (UFF)
dc.contributor.institutionUnigranrio
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.date.accessioned2022-04-28T19:48:31Z
dc.date.available2022-04-28T19:48:31Z
dc.date.issued2022-01-01
dc.description.abstractPremature regression of corpus luteum (PRCL) is a functional alteration that occurs mainly in superovulated females hampering the widespread use of multiple ovulation and embryo transfer (MOET). This study evaluated the association of donor age (3–9 years old), body condition score (2 to 4.5), number of MOET (1 to 5) repetitions and season (breeding, transition, or non-breeding) with the occurrence of PRCL in ewes. Multiparous Dorper ewes (n = 44) were subjected to MOET during four consecutive years, with the same superovulatory treatment. Before embryo collection, ovaries were laparoscopically performed to assess the corpora lutea (CL). Overall, the total PRCL occurrence was 24.7% (26/105) and it had no association with the studied factors. Percentages of ewes that presented PRCL once or twice were 45.5% (20/44) and 6.8% (3/44), respectively, while the percentage of ewes that had no PRCL was 47.7% (21/44). Proportions of PRCL were similar (P > 0.05) among breeding (21%), transition (31%), and non-breeding (24%) season; and also (P > 0.05) in lower/thin (20%), average/good (24%), and higher/fat (29%) females. In conclusion, although this phenomenon had no association to the factors studied, the occurrence of PRCL affects ∼25% of ewes subjected to MOET procedures and future alternatives to circumvent this obstacle need to be developed.en
dc.description.affiliationFaculdade de Medicina Veterinária e Zootecnia Universidade de São Paulo
dc.description.affiliationFaculdade de Veterinária Universidade Federal Fluminense
dc.description.affiliationUnigranrio
dc.description.affiliationFaculdade de Ciências Agrárias e Veterinárias Universidade Estadual Paulista
dc.description.affiliationEmbrapa Caprinos e Ovinos
dc.description.affiliationUnespFaculdade de Ciências Agrárias e Veterinárias Universidade Estadual Paulista
dc.identifierhttp://dx.doi.org/10.1016/j.livsci.2021.104808
dc.identifier.citationLivestock Science, v. 255.
dc.identifier.doi10.1016/j.livsci.2021.104808
dc.identifier.issn1871-1413
dc.identifier.scopus2-s2.0-85121621262
dc.identifier.urihttp://hdl.handle.net/11449/223097
dc.language.isoeng
dc.relation.isnodouble231635*
dc.relation.ispartofLivestock Science
dc.sourceScopus
dc.subjectAbnormal CL
dc.subjectLuteal dysfunction
dc.subjectSeasonality, Sheep
dc.subjectSuperovulation
dc.titleOccurrence of premature regression of corpus luteum in MOET programs in Dorper ewes under subtropical climateen
dc.typeArtigo

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