Data/hora: 03/06/2024 08:49:57

Biblioteca(s): 	Embrapa Caprinos e Ovinos.	
Data corrente: 	17/08/2022	
Data da última atualização: 	19/08/2022	
Autoria: 	ROCHA, M. S.; MAIA, A. L. R. S.; RANGEL, P. S. C.; OLIVEIRA, M. E. F.; FONSECA, J. F. da; OLIVEIRA, C. A.; SOUZA-FABJAN, J. M. G.	
Afiliação: 	MARCELA S. ROCHA; ANA LUCIA R. S. MAIA; PAULO SÉRGIO C. RANGEL; MARIA EMILIA F. OLIVEIRA; JEFERSON FERREIRA DA FONSECA, CNPC; CLÁUDIO A. OLIVEIRA; JOANNA M. G. SOUZA-FABJAN.	
Título: 	Occurrence of premature regression of corpus luteum in MOET programs in Dorper ewes under subtropical climate.	
Ano de publicação: 	2022	
Fonte/Imprenta: 	Livestock Science, v. 255, 104808, 2022.	
DOI: 	http://dx.doi.org/10.1016/j.livsci.2021.104808	
Idioma: 	Inglês	
Conteúdo: 	Premature regression of corpus luteum (PRCL) is a functional alteration that occurs mainly in superovulated females hampering the widespread use of multiple ovulation and embryo transfer (MOET). This study evaluated the association of donor age (3?9 years old), body condition score (2 to 4.5), number of MOET (1 to 5) repetitions and season (breeding, transition, or non-breeding) with the occurrence of PRCL in ewes. Multiparous Dorper ewes (n = 44) were subjected to MOET during four consecutive years, with the same superovulatory treatment. Before embryo collection, ovaries were laparoscopically performed to assess the corpora lutea (CL). Overall, the total PRCL occurrence was 24.7% (26/105) and it had no association with the studied factors. Percentages of ewes that presented PRCL once or twice were 45.5% (20/44) and 6.8% (3/44), respectively, while the percentage of ewes that had no PRCL was 47.7% (21/44). Proportions of PRCL were similar (P > 0.05) among breeding (21%), transition (31%), and non-breeding (24%) season; and also (P > 0.05) in lower/thin (20%), average/good (24%), and higher/fat (29%) females. In conclusion, although this phenomenon had no association to the factors studied, the occurrence of PRCL affects ?25% of ewes subjected to MOET procedures and future alternatives to circumvent this obstacle need to be developed.	
Palavras-Chave: 	Abnormal CL; Luteal dysfunction; MOET; Seasonality.	
Thesagro: 	Corpo Lúteo; Ovelha; Ovino; Reprodução Animal; Superovulação.	
Thesaurus Nal: 	Assisted reproductive technologies; Embryo transfer; Reproduction; Sheep; Superovulation.	
Categoria do assunto: 	L Ciência Animal e Produtos de Origem Animal	
Registro original: 	Embrapa Caprinos e Ovinos (CNPC)	
Exemplares: 	CNPC - (40330-1) - UPC - AP - DD -  -  -  - DIS