Administration of a single dose of 300 IU of human chorionic gonadotropin seven days after the onset of estrus improves pregnancy rate in dairy goats by an unknown mechanism

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Federal Fluminense (UFF)-
Autor(es): dc.contributorUniv Grande Rio-
Autor(es): dc.contributorUniv Presidente Antonio Carlos-
Autor(es): dc.contributorEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniv Guelph-
Autor(es): dc.creatorCortes, L. R.-
Autor(es): dc.creatorSouza-Fabjan, J. M. G.-
Autor(es): dc.creatorDias, D. S.-
Autor(es): dc.creatorMartins, B. B.-
Autor(es): dc.creatorMaia, A. L. R. S.-
Autor(es): dc.creatorVeiga, M. O.-
Autor(es): dc.creatorArashiro, E. K. N.-
Autor(es): dc.creatorBrandao, F. Z.-
Autor(es): dc.creatorOliveira, M. E. F. [UNESP]-
Autor(es): dc.creatorBartlewski, P. M.-
Autor(es): dc.creatorFonseca, J. F.-
Data de aceite: dc.date.accessioned2022-02-22T00:57:32Z-
Data de disponibilização: dc.date.available2022-02-22T00:57:32Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2020-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.domaniend.2020.106579-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/209756-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/209756-
Descrição: dc.descriptionThis study examined the effects of exogenous hCG administration on ovarian function and pregnancy rates in estrous-induced dairy goats during the transition into the breeding season. Eighty-six Toggenburg does received 60 mg of medroxyprogesterone acetate intravaginal sponge for 6 d plus 200 IU of equine chorionic gonadotropin and 30 mg of d-cloprostenol i.m. 24 h before sponge removal, and were then bred for 96 h. Seven days (D7) after first mating the does received either 1 mL of saline (the control group, n = 43) or 300 IU of hCG (the hCG-treated group, n = 43) i.m. Transrectal ovarian ultrasonography (B-mode and color Doppler) was performed on D7, D13, D17, and D21 and ultrasonographic pregnancy detection on D30. Pregnancy rate was higher (P < 0.05) in hCG-treated goats (90.7%; 39/43) than that in control animals (74.4%; 32/43). Accessory luteal structures (ALSs) were detected in 46.5% (20/43) of hCG-treated does. All hCG-treated does that had ALSs and 82.6% of goats without ALS post-treatment remained pregnant. The total luteal area increased (P < 0.05) from D7 to D13 in pregnant animals of both groups, whereas mean vascular area declined (P < 0.05) by D21 in all nonpregnant does. Serum progesterone concentrations increased (P < 0.05) on D21 in pregnant goats of both groups, but they were related to changes in luteal tissue content only in control does throughout the present study. Mean daily numbers of small- and medium-sized antral follicles decreased (P < 0.05) only in pregnant animals of both groups with a decline in medium follicle numbers occurring earlier in hCG-treated (D13) compared with control does (D17). To summarize, a single dose of hCG given on D7 after estrus was followed by a decrease in the number of medium-sized antral follicles in gestating hCG-treated does, induced the formation of ALSs in similar to 47% of all hCG-treated does, and significantly increased the pregnancy rate in estrous-induced Toggenburg goats in the transition to the breeding season. (C) 2020 Elsevier Inc. All rights reserved.-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionEMBRAPA-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)-
Descrição: dc.descriptionUniv Fed Fluminense, Fac Vet, Rua Vital Brasil Filho 64, Niteroi, RJ, Brazil-
Descrição: dc.descriptionUniv Grande Rio, Fac Med Vet, Rua Prof Jose de Souza Herdy 1160, Duque De Caxias, RJ, Brazil-
Descrição: dc.descriptionUniv Presidente Antonio Carlos, Av Juiz de Fora 1100, Juiz De Fora, MG, Brazil-
Descrição: dc.descriptionEmbrapa Caprinos & Ovinos, Rodovia MG 133,Km 42, Coronel Pacheco, MG, Brazil-
Descrição: dc.descriptionSao Paulo State Univ, Dept Prevent Vet Med & Anim Reprod, Via Acesso Prof Paulo Donato Castelane S-N, Jaboticabal, SP, Brazil-
Descrição: dc.descriptionUniv Guelph, Ontario Vet Coll, Dept Biomed Sci, Guelph, ON N1G 2W1, Canada-
Descrição: dc.descriptionSao Paulo State Univ, Dept Prevent Vet Med & Anim Reprod, Via Acesso Prof Paulo Donato Castelane S-N, Jaboticabal, SP, Brazil-
Descrição: dc.descriptionCNPq: 314952/2018-7-
Descrição: dc.descriptionEMBRAPA: 20.19.01.004.00.03.001-
Descrição: dc.descriptionFAPEMIG: CVZPPM-000201-17-
Formato: dc.format12-
Idioma: dc.languageen-
Publicador: dc.publisherElsevier B.V.-
Relação: dc.relationDomestic Animal Endocrinology-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectConception rate-
Palavras-chave: dc.subjectGoat-
Palavras-chave: dc.subjecthCG-
Palavras-chave: dc.subjectOvary-
Palavras-chave: dc.subjectProgesterone-
Palavras-chave: dc.subjectUltrasonography-
Título: dc.titleAdministration of a single dose of 300 IU of human chorionic gonadotropin seven days after the onset of estrus improves pregnancy rate in dairy goats by an unknown mechanism-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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