Data/hora: 22/06/2024 08:17:46

Biblioteca(s): | Embrapa Gado de Leite.
Data corrente: | 01/02/2016
Data da última atualização: | 01/02/2024
Autoria: | FIQUEIRA, L. M.; FONSECA, J. F. da; ARASHIRO, E. K. N.; SOUZA-FABJAN, J. M. G.; RIBEIRO, A. C. S.; OBA, E.; VIANA, J. H. M.; BRANDÃO, F. Z.
Afiliação: | L. M. Figueira, Universidade Federal Fluminense - RJ; JEFERSON FERREIRA DA FONSECA, CNPC; E. K. N. Arashiro; J. M. G. Souza-Fabjan, Universidade Federal Flumiense, RJ; A. C. S. Ribeiro, Universidade Federal Flumiense, RJ; E. Oba, Universidade Estadual Paulista, SP; JOAO HENRIQUE MOREIRA VIANA, CNPGL; F. Z. Brandão, Universidade Federal Flumiense, RJ.
Título: | Colour Doppler Ultrasonography as a Tool to Assess Luteal Function in Santa Inês Ewes.
Ano de publicação: | 2015
Fonte/Imprenta: | Reproduction in Domestic Animals, v. 50, n. 4, p. 643-650, 2015.
Idioma: | Português
Conteúdo: | Abstract: The aim of this study was to evaluate luteal dynamics in the Santa Inês ewes using colour Doppler (CD) ultrasonography. Oestrus was synchronized in nulliparous females (n = 18), and subsequently, they were only teased (n = 6) or teased and mated (n = 12). Blood samples were collected daily for plasma progesterone (P4 ) concentrations. Ultrasonographic images of corpora lutea (CL) in CD mode were obtained for further analysis in its largest diameter. The CD mode allowed an early sequential monitoring of CL that was visualized by the first time 0.77 ± 0.62 days after ovulation, with luteal area 29.68 ± 13.21 mm2 . During the luteogenesis, a progressive increase was observed, followed by a plateau of luteal area, vascularization area and plasma concentrations of P4 reaching maximum values in D11 (124.0 ± 38.0 mm2 , 52.78 ± 24.08 mm2 and 11.23 ± 4.89 ng/ml, respectively). In the luteolysis, the plasma concentrations of P4 decreased sharply, whereas luteal and vascularization area gradually. The vascularization area was positively correlated with plasma concentrations of P4 during the luteogenesis (r = 0.22) and luteolysis (r = 0.48). The luteal dynamics of Santa Inês ewes showed patterns similar to those observed in other sheep breeds studied. The CD ultrasonography has the potential to be used as a tool to assess luteal function in sheep.
Palavras-Chave: | Dinâmica folicular; Luteal dynamics; Oestrous cycle; Plasma progesterone; Progesterona plasmática; Raça Santa Inês; Synchronization; Synchronized females; Ultra-Som.
Thesagro: | Ciclo estral; Ovino; Ovulação; Reprodução animal; Sincronização do cio.
Thesaurus Nal: | Animal reproduction; Ovulation; Sheep; Ultrasonography.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Gado de Leite (CNPGL)
Exemplares: | CNPGL - (22299-1) - UPC - AP - DD -  -  -  - DIS