Data/hora: 02/06/2024 01:37:11

Provedor de dados: 	45	
País: 	Brazil	
Título: 	Ultrastructure of bovine placenta during all gestational period	
Autores: 	Santos,R.B.; Silva,J.M.; Beletti,M.E.	
Data: 	2017-11-01	
Ano: 	2017	
Palavras-chave: 	Bovine placenta; Ultrastructure; Maternal-fetal interaction; Cotyledon; Caruncles.	
Resumo: 	ABSTRACT Placentas from pregnant cows with different gestation periods were used. Placental fragments of all groups were processed and evaluated by transmission electron microscopy. After fragment analysis, bovine placenta was observed to be epitheliochorial type in early pregnancy, becoming progressively sinepiteliocorial at the beginning of the second trimester. There are no ultrastructural evidences of inflammation in the region of caruncles throughout gestation, despite the invasion of caruncle proper lamina by trophoblast cells. However, throughout pregnancy and especially at the end, there were evident signs of cell degeneration in both trophoblast and the uterine epithelium. The active trophoblast cells intensely phagocytize cellular debris. There are complex interdigitations between the surface of the trophoblast and the uterine epithelium, which is related to the increase of the exchange surface between mother and fetus. At the end of pregnancy, interdigitations disappear, favoring the detachment and expulsion of the placenta after birth.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352017000601376	
Editor: 	Universidade Federal de Minas Gerais, Escola de Veterinária	
Relação: 	10.1590/1678-4162-9022	
Formato: 	text/html	
Fonte: 	Arquivo Brasileiro de Medicina Veterinária e Zootecnia  v.69 n.6 2017	
Fonte: 	info:eu-repo/semantics/openAccess