Data/hora: 06/06/2024 02:34:53

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 30/11/2020
Data da última atualização: | 30/11/2020
Autoria: | FIGUEIRA, L. M.; ALVES, N. G.; SOUZA-FABJAN, J. M. G.; VERGANI, G. B.; OLIVEIRA, M. E. F.; LIMA, R. R. de; FONSECA, J. F. da.
Afiliação: | LUCAS MACHADO FIGUEIRA, Universidade Federal de Lavras (UFLA) - Lavras, MG, Brazil; NADJA GOMES ALVES, Universidade Federal de Lavras (UFLA) - Lavras, MG, Brazil; JOANNA MARIA GONÇALVES SOUZA-FABJAN, Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; GABRIEL BRUN VERGANI, Universidade Estadual Paulista "Júlio de Mesquita Filho" (Unesp) - Jaboticabal, SP, Brazil; MARIA EMILIA FRANCO OLIVEIRA, Universidade Estadual Paulista "Júlio de Mesquita Filho" (Unesp) - Jaboticabal, SP, Brazil; RENATO RIBEIRO DE LIMA, Universidade Federal de Lavras (UFLA) - Lavras, MG, Brazil; JEFERSON FERREIRA DA FONSECA, CNPC.
Título: | Ultrasonographic cervical evaluation: A tool to select ewes for non-surgical embryo recovery.
Ano de publicação: | 2020
Fonte/Imprenta: | Reproduction in Domestic Animals, v. 55, n. 11, p. 1638-1645, Nov. 2020.
DOI: | https://doi.org/10.1111/rda.13825
Idioma: | Inglês
Conteúdo: | Abstract: This study assessed the cervical ultrasonography mapping as a tool to select donor ewes for non-surgical embryo recovery (NSER). Lacaune ewes had their cervix evaluated by ultrasonography 12 hr after induced oestrus onset (Trial 1, n = 24) or 30 min before NSER (Trial 2, n = 17). Cervical rings were longitudinally evaluated and classified by their degree of misalignment on ultrasonography (DMUS) into: DMUS-1- cervix rectilinear, DMUS-2 - intermediate and DMUS-3 highly asymmetrical. For predicting cervical transposing, only DMUS-1 and DMUS-2 were considered suitable. Similar ranking was attributed to degree of misalignment on the cervical map (DMCM 1-3), established immediately before NSER, which was performed at days 6 to 7 after oestrus. In Trial 1, cervical retraction for NSER was not possible only in three ewes classified as DMUS-3 (3/14, 21.4%). No difference (p > .05) was observed in the cervical transposing rates between ewes with different DMUS (ranged from 80% to 100%). In Trial 2, DMUS-1 and DMUS-2 reached 100% of transposing, and the only DMUS-3 ewe has not been transposed. In Trial 1, the prediction performance for successful cervical transposing showed low sensitivity (45%) and no specificity due to a high incidence of false negatives (52%). However, in Trial 2, sensitivity and specificity were both 100%. The DMCM and DMUS were uncorrelated, probably due to cervical stretching required to perform NSER. In conclusion, cervical ultrasound assessment immediately before NSER was more efficient to predict the cervical transposing than at induced oestrus, allowing the classification and selection of ewes eligible for NSER.
Palavras-Chave: | Cervical transposing; Oestrous cycle; Ultrasound.
Thesaurus Nal: | Cervix; Embryo transfer; Estrus synchronization; Reproduction; Sheep.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (39692-1) - UPC - AP - DD -  -  -  - DIS