Data/hora: 04/06/2024 13:20:08

Biblioteca(s): 	Embrapa Caprinos e Ovinos; Embrapa Gado de Leite; Embrapa Pecuária Sudeste.	
Data corrente: 	15/01/2024	
Data da última atualização: 	06/03/2024	
Autoria: 	GONÇALVES, J. D.; VERGANI, G. B.; RODRIGUES, J. N. D.; DIAS, J. H.; PEREIRA, V. S. do A.; GARCIA, A. R.; ESTEVES, S. N.; FONSECA, J. F. da; OLIVEIRA, M. E. F.	
Afiliação: 	JOEDSON DANTAS GONÇALVES, São Paulo State University; GABRIEL BRUN VERGANI, São Paulo State University; JULIANA NASCIMENTO DUARTE RODRIGUES, Federal University of Viçosa; JENNIFFER HAUSCHILDT DIAS, Federal University of Viçosa; VERONICA SCHINAIDER DO A PEREIRA, CNPGL; ALEXANDRE ROSSETTO GARCIA, CPPSE; SERGIO NOVITA ESTEVES, CPPSE; JEFERSON FERREIRA DA FONSECA, CNPC; MARIA EMILIA FRANCO OLIVEIRA, São Paulo State University.	
Título: 	Luteal tissue characteristics of Morada Nova ewes with hCG application 7.5 days after the end of estrus synchronization protocol in the breeding season.	
Ano de publicação: 	2024	
Fonte/Imprenta: 	Animal Reproduction Science, v. 261, 107396, Feb. 2024.	
DOI: 	https://doi.org/10.1016/j.anireprosci.2023.107396	
Idioma: 	Inglês	
Conteúdo: 	Abstract: Results with the use of hCG after synchronization protocol are still inconsistent, which may vary according to breed, season, day of application and dose of the drug used. The aim of the present study was to evaluate the functionality of luteal tissue and ovarian perfusion after hCG treatment during early luteal phase. Estrus-synchronized ewes were randomly assigned to receive i.m. injection of 300 IU of hCG (G-hCG; n = 40) or 1 mL of saline (G-Control; n = 32) on Day 7.5 after progesterone withdrawal. Ultrasonographic evaluations of the ovaries and ovarian and iliac arteries were performed on Days 7.5, 10.5, 13.5, and 21.5. The accessory corpus luteum (aCL) formation rate was 52.5% for G-hCG. There was interaction (p > 0.05) for treatment (G-hCG and G-Control), days (7.5, 10.5, 13.5 and 21.5) and PD (Pregnant and Non-pregnant) for the variables of biometric characteristics of the corpus luteum B-Mode and Color Doppler on days 7.5, 10.5, 13.5 and 21.5. There was no difference (p > 0.05) for pregnancy rates and mean fetuses per ewe between the treatment groups. It is concluded that the application of hCG 7.5 days after the hormonal protocol in Morada Nova ewes in a breeding season is efficient in inducing aCL formation and increasing luteal tissue biometry. However, there was no effect on pregnancy rate.	
Palavras-Chave: 	Accessory corpora lutea; Arterial velocimetric indices; HCG; Luteal color Doppler signs; Non-breeding; Ovarian ultrasound.	
Thesaurus Nal: 	Breeding; Chorionic gonadotropins; Estrus synchronization; Ewes; Females; Males; Pharmacology; Pregnancy rate; Progesterone; Reproduction; Reproductive efficiency; Seasons; Sheep.	
Categoria do assunto: 	L Ciência Animal e Produtos de Origem Animal	
Registro original: 	Embrapa Gado de Leite (CNPGL)	
Exemplares: 	CPPSE - (26325-1) - UPC - AP - DD - PROCI-2024.00006 - GON - 2024.00039 - DIS
CNPGL - (26242-1) - UPC - AP - DD -  -  -  - DIS
CNPC - (40788-1) - UPC - AP - DD -  -  -  - DIS