Fixed-time insemination with frozen semen in mares: is it suitable for poorly fertile stallions?

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dc.contributor.authorAvanzi, Bruno Ribeiro [UNESP]
dc.contributor.authorRamos, Renata dos Santos [UNESP]
dc.contributor.authorMarques Araujo, Gustavo Henrique
dc.contributor.authorFioratti, Eduardo Gorzoni [UNESP]
dc.contributor.authorTrinca, Luzia Aparecida [UNESP]
dc.contributor.authorDell'Aqua, Jose Antonio [UNESP]
dc.contributor.authorMelo e Ona, Cely Marini
dc.contributor.authorZahn, Fabiola Soares [UNESP]
dc.contributor.authorMartin, Ian [UNESP]
dc.contributor.authorAlvarenga, Marco Antonio [UNESP]
dc.contributor.authorPapa, Frederico Ozanam [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Camilo Castelo Branco
dc.contributor.institutionUniversidade Federal de Goiás (UFG)
dc.date.accessioned2015-10-21T13:10:02Z
dc.date.available2015-10-21T13:10:02Z
dc.date.issued2015-06-01
dc.description.abstractThe purpose of the present study was to compare two protocols for equine frozen semen programs using either postovulation insemination or fixed-time insemination (FT), evaluating both pregnancy rates and intrauterine fluid (IUF) accumulation after artificial insemination with semen obtained from either highly or poorly fertile stallions. Six ejaculates from two stallions (n = 12) were processed. After thawing, semen samples were evaluated by computerized semen analysis. Fifteen mares (30 cycles) were inseminated with frozen semen from highly fertile stallion A, and 14 mares (28 cycles) were inseminated with frozen semen from poorly fertile stallion B. Ovulations were induced with I mg (intramuscular) of deslorelin acetate after the observation of a greater than 35 mm follicle and uterine edema. In postovulation insemination group, mares were inseminated once with 800 x 10(6) total sperm in a maximum 6-hour interval after ovulation. In FT group, mares were inseminated twice with 400 x 10(6) total sperm, 24 and 40 hours after induction. Mares were ultrasonographically examined for IUF accumulation 24 hours and for pregnancy diagnosis 14 days after the last insemination. Although IUF accumulation was more evident in mares inseminated once postovulation, pregnancy rates were similar for both protocols, regardless of the stallion, although a significant effect of the stallion was observed. These results indicated that FTs may be used for both highly and poorly fertile stallions as a practical tool to help spreading the use of frozen semen in equine reproduction programs.en
dc.description.affiliationUniversidade Estadual Paulista (UNESP) - Faculdade de Medicina Veterinária e Zootecnia (FMVZ), Department of Animal Reproduction and Veterinary Radiology, Botucatu, São Paulo, Brazil
dc.description.affiliationUniversidade Estadual Paulista (UNESP), Department of Biostatistics - UNESP, Botucatu, São Paulo, Brazil
dc.description.affiliationCamilo Castelo Branco University, Descalvado, São Paulo, Brazil
dc.description.affiliationVeterinary School of Goiás Federal University, Goiânia, Goiás, Brazil
dc.description.affiliationUnespUniversidade Estadual Paulista (UNESP) - Faculdade de Medicina Veterinária e Zootecnia (FMVZ), Department of Animal Reproduction and Veterinary Radiology, Botucatu, São Paulo, Brazil
dc.description.affiliationUnespUniversidade Estadual Paulista (UNESP), Department of Biostatistics - UNESP, Botucatu, São Paulo, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent1389-1393
dc.identifierhttp://www.sciencedirect.com/science/article/pii/S0093691X14003483
dc.identifier.citationTheriogenology. New York: Elsevier Science Inc, v. 83, n. 9, p. 1389-1393, 2015.
dc.identifier.doi10.1016/j.theriogenology.2014.07.007
dc.identifier.issn0093-691X
dc.identifier.lattes3720489366427955
dc.identifier.lattes0473846154288947
dc.identifier.urihttp://hdl.handle.net/11449/128458
dc.identifier.wosWOS:000353931400002
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofTheriogenology
dc.relation.ispartofjcr2.136
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectHorseen
dc.subjectArtificial inseminationen
dc.subjectFrozen semenen
dc.subjectFertilityen
dc.titleFixed-time insemination with frozen semen in mares: is it suitable for poorly fertile stallions?en
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes3720489366427955
unesp.author.lattes0473846154288947
unesp.author.orcid0000-0003-1106-8505[5]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Botucatupt
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Medicina Veterinária e Zootecnia, Botucatupt

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Artigos - Reprodução Animal e Radiologia Veterinária - FMVZ
Artigos - Bioestatística - IBB