Data/hora: 24/06/2024 07:10:03

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 13/06/2017
Data da última atualização: | 10/04/2024
Autoria: | OLIVEIRA, M. E. F.; BARTLEWSKI, P. M.; JANKOWSKI, N.; PADILHA-NAKAGHI, L. C.; OLIVEIRA, L. G.; BICUDO, S. D.; FONSECA, J. F. da; VICENTE, W. R. R.
Afiliação: | MARIA EMÍLIA FRANCO OLIVEIRA, UNIVERSIDADE ESTADUAL PAULISTA; UNIVERSITY OF GUELPH; Biomedical Sciences, Ontario Veterinary College - University of Guelph - Guelph, Ontario, Canada; UNESP - Jaboticabal, São Paulo, Brazil; UNESP - Jaboticabal, São Paulo, Brazil; SONY D. BICUDO, Paulo State University (USP) - Botucatu, SP, Brazil; JEFERSON FERREIRA DA FONSECA, CNPC; UNESP - Jaboticabal, São Paulo, Brazil.
Título: | Relationship of antral follicular blood flow velocity to superovulatory responses in ewes.
Ano de publicação: | 2017
Fonte/Imprenta: | Animal Reproduction Science, v. 182, p. 88-55, Jul. 2017.
DOI: | 10.1016/j.anireprosci.2017.04.009
Idioma: | Inglês
Conteúdo: | Abstract: The aim of this study was to examine the association between antral follicular blood flow velocity and the response of ewes to hormonal ovarian superstimulation. Ten Santa Inês ewes were subjected to a short- (7days; Group 1) or long-term (13days; Group 2) progesterone (CIDR®; InterAg, Hamilton, New Zealand) priming, and a superovulatory treatment with porcine follicle-stimulating hormone (pFSH; Folltropin®-V; Bioniche Animal Health, Belleville, ON, Canada), given twice daily for four consecutive days in decreasing doses and initiated four or ten days after CIDR insertion, respectively. Embryos were recovered surgically seven days after the last pFSH dose. From one day prior to until the end of the pFSH regimen (Days -1 to 3), all ewes underwent daily transrectal ultrasonography of ovaries. The number of high-velocity pixels (HVPs; 0.055-0.11m/s or upper 50% of recordable velocities) on Day 1 correlated directly with the number of corpora lutea (CL; r=0.92, P=0.0002) and of viable embryos (r=0.77, P=0.01). Correlations were also recorded between the number of HVPs on Day 3 and the recovery rate (r=-0.69, P=0.03), viability rate (r=-0.64, P=0.05), and percentage of degenerated embryos (r=0.65, P=0.04). The percentage of HVPs relative to the total area of ovarian cross section on Day 1 was correlated with the number of CL (r=0.95, P<0.001) and of viable embryos (r=0.85, P=0.002). This parameter on Day 3 was also correlated with the recovery rate (r=-0.69, P=0.03). The percentage of HVPs relative to the total Doppler area on Day 0 was correlated with the recovery rate (r=0.72, P=0.02). It can be concluded that sonographic assessment of high-velocity antral follicular blood flow has the makings of a useful non-invasive method to predict the outcome of the superovulatory treatment in ewes.
Palavras-Chave: | Blood flow velocity; Color Doppler sonography; Folículos ovarianos; Ovaries.
Thesagro: | Corpo Lúteo; Ovário; Ovelha; Ovino; Reprodução animal; Superovulação.
Thesaurus Nal: | Blood circulation; Corpus luteum; Ewes; Ovarian follicles; Reproduction; Reproductive performance; Sheep; Superovulation.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (33793-1) - UPC - AP - DD -  -  -  - DIS