Characterization of the LH peak after short and long fixed-time artificial insemination protocols in sheep raised in the tropics

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dc.contributor.authorSoriano, Gabriela Azenha Milani
dc.contributor.authorde Ruediger, Felipe Rydygier [UNESP]
dc.contributor.authorZundt, Marilice
dc.contributor.authorGomes, Marco Aurélio da Cruz Nobre
dc.contributor.authorde Souza, Lilian Francisco Arantes
dc.contributor.authorGiometti, Ines Cristina
dc.contributor.authorde Paula Nogueira, Guilherme [UNESP]
dc.contributor.authorZanelli, Gustavo Ricci
dc.contributor.authorde Almeida Rego, Fabiola Cristiane
dc.contributor.authorCastilho, Caliê
dc.contributor.institutionPresidente Prudente (UNOESTE)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Norte do Paraná (UNOPAR)
dc.date.accessioned2018-12-11T16:55:10Z
dc.date.available2018-12-11T16:55:10Z
dc.date.issued2018-09-01
dc.description.abstractThe aim of this study was to evaluate the peak in luteinizing hormone (LH) and the pregnancy rate of sheep (Texel × Santa Inês) in the tropics using short- (6 days) and long-term (12 days) progesterone protocols followed by artificial insemination (AI) both in and out of the breeding season. Experiment 1 was conducted within (IN) the breeding season (autumn, n = 36), and experiment 2 was conducted outside (OUT) of the breeding season (spring, n = 43). In each experiment, the sheep were divided into two groups (6 or 12 days) according to the duration of treatment with a single-use progesterone release vaginal device (CIDR®, Pfizer, São Paulo, SP, Brazil), and blood samples were collected from 10 animals per group every 4 hr to measure the LH and progesterone concentrations. In the spring, the characteristics of the LH peak did not differ between groups; but in the autumn, there were differences between groups at the beginning (G-6 IN: 36.44 ± 5.46 hr; G-12 IN: 26.57 ± 4.99 hr) and end of the LH peak (G-6 IN: 46.22 ± 7.51 hr; G-12 IN: 34.86 ± 8.86 hr). The results showed alterations in the LH peak during the breeding season only in the sheep undergoing the short-term protocol.en
dc.description.affiliationUniversidade do Oeste Paulista Presidente Prudente (UNOESTE)
dc.description.affiliationUniversidade Estadual Paulista (UNESP)
dc.description.affiliationUniversidade Norte do Paraná (UNOPAR)
dc.description.affiliationUnespUniversidade Estadual Paulista (UNESP)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.format.extent1245-1252
dc.identifierhttp://dx.doi.org/10.1111/asj.13051
dc.identifier.citationAnimal Science Journal, v. 89, n. 9, p. 1245-1252, 2018.
dc.identifier.doi10.1111/asj.13051
dc.identifier.issn1740-0929
dc.identifier.issn1344-3941
dc.identifier.scopus2-s2.0-85052712694
dc.identifier.urihttp://hdl.handle.net/11449/171398
dc.language.isoeng
dc.relation.ispartofAnimal Science Journal
dc.relation.ispartofsjr0,586
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectCIDR
dc.subjectphotoperiod
dc.subjectprogesterone
dc.subjectradioimmunoassay
dc.subjectSanta Inês
dc.titleCharacterization of the LH peak after short and long fixed-time artificial insemination protocols in sheep raised in the tropicsen
dc.typeArtigo
unesp.author.orcid0000-0003-3300-8116[10]

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