Data/hora: 15/06/2024 15:53:40

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | A - 2
Data corrente: | 22/12/2021
Data da última atualização: | 22/12/2021
Autoria: | RODRIGUES, J. N. D.; GUIMARÃES, J. D.; OLIVEIRA, M. E. F.; DIAS, J. H.; ARRAIS, A. M.; SOUSA, M. A. P. de; BASTOS, R.; AHMADI, B.; BARTLEWSKI, P. M.; FONSECA, J. F. da.
Afiliação: | JULIANA NASCIMENTO DUARTE RODRIGUES, Universidade Federal de Viçosa (UFV) - Viçosa, MG, Brazil; JOSÉ DOMINGOS GUIMARÃES, Universidade Federal de Viçosa (UFV) - Viçosa, MG, Brazil; MARIA EMILIA FRANCO OLIVEIRA, Universidade Estadual Paulista (Unesp) - Jaboticabal, SP, Brazil; JENNIFFER HAUSCHILDT DIAS, Universidade Federal de Viçosa (UFV) - Viçosa, MG, Brazil; ALINE MATOS ARRAIS, Universidade Federal Rural do Rio de Janeiro (UFRRJ) - Seropédica, RJ, Brazil; MARCO ANTONIO PAULA DE SOUSA, Universidade Federal do Pará (UFPA) - Castanhal, PA, Brazil; ROSEMARY BASTOS, Universidade Estadual do Norte Fluminense Darcy Ribeiro - Campos dos Goytacazes, RJ, Brazil; BAHAREH AHMADI, Ontario Veterinary College, University of Guelph - Guelph, Ontario, Canada; PAWEL MIECZYSLAW BARTLEWSKI, Ontario Veterinary College, University of Guelph - Guelph, Ontario, Canada; JEFERSON FERREIRA DA FONSECA, CNPC.
Título: | Human chorionic gonadotropin affects original (ovulatory) and induced (accessory) corpora lutea, progesterone concentrations, and pregnancy rates in anestrous dairy goats.
Ano de publicação: | 2021
Fonte/Imprenta: | Reproductive Biology, v. 22, n. 1, e100591, Mar. 2022.
DOI: | https://doi.org/10.1016/j.repbio.2021.100591
Idioma: | Inglês
Conteúdo: | Abstract: Two experiments were conducted in acyclic Alpine (A) and Saanen (S) goats that received intravaginal sponges containing 60 mg of medroxyprogesterone acetate for 6 days, as well as 200 IU of eCG and 30 &#956;g d-cloprostenol i.m. 24 h before sponge removal. On day 7 (day 0 = onset of synchronized estrus), all goats were randomly divided into two groups: animals treated with 300 IU of hCG i.m. (hCG; Exp.1: n = 8A; Exp.2: n = 75A + S) and untreated controls (Control; Exp.1: n = 8A; Exp. 2: n = 70A + S). In Exp.2, all goats were artificially inseminated. Transrectal ovarian ultrasonography and blood collection were done on days 7, 10, 13, 17, and 21 (Exp.1), and pregnancy detection on day 60 (Exp.2). Estrus and ovulations occurred in five hCG and seven Control animals. Accessory CL (aCL) were detected in all hCG does. The total luteal area of ovulatory corpora lutea (oCL) increased (P < 0.05) on day 10 in hCG does and remained greater (P < 0.05) than in Control until day 21. Total and high-velocity color Doppler area were greater (P < 0.05) for oCL of hCG does on days 13 and 17. Progesterone concentrations were greater (P < 0.05) in hCG does from days 13 to 21 and related directly to the total luteal and oCL area for the duration of the study in all does. The pregnancy rate was higher (P < 0.05) in hCG than in Control by 22.5 %. Human chorionic gonadotropin given on day 7 of the synchronized estrous cycle positively affected CL function and pregnancy rates in seasonally anovular dairy goats.
Palavras-Chave: | Ovarian ultrasonography.
Thesaurus Nal: | Animal reproduction; Brazil; Corpus luteum; Human chorionic gonadotropin; Pregnancy rate; Progesterone.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (39945-1) - UPC - AP - DD -  -  -  - DIS