Data/hora: 23/06/2024 10:07:29

Biblioteca(s): 	Embrapa Caprinos e Ovinos.	
Data corrente: 	01/08/1992	
Data da última atualização: 	26/06/2023	
Autoria: 	BURD, L. I.; TAKAHASHI, K.; WARD, K.; ASCHERMAN, G.; DOWERS, S.	
Título: 	The relationship of changes in mammary blood flow and plasma progesterone at the time of parturition in the ewe.	
Ano de publicação: 	1978	
Fonte/Imprenta: 	American Journal of Obstetric and Ginecology, v. 132, n. 4, p. 385-391, Oct. 1978.	
DOI: 	10.1016/0002-9378(78)90772-x	
Idioma: 	Inglês	
Conteúdo: 	Previous studies indicate that there is a fall in maternal plasma pregesterone and a marked increase in mammary blood flow (MBF) at the time of parturition in ewes. In this experiment the role of progesterone as a cause of this increase in MBF was investigated. Progesterone was infused (9.9 mcg. per minute) into a branch of the mammary artery in five sheep during the induction of premature labor by fetal dexamethasone infusion (1 mg. per 24 hours) to prevent the normal fall in concentration of local mammary artery progesterone. Five ewes used as controls received a mammary artery infusion of cholesterol (9.9 mcg. per minute). In the cholesterol-infused group MBF increased significantly from baseline values after 13 mais ou menos 4 hours (mean mais ou menos standard error) to a peak flow of 235 mais ou menos 9 ml. per minute. In the group receiving the progesterone the increase in MBF was delayed to 35 mais ou menos 7 hours, reaching only 161 mais ou menos 22 ml. per minute. These results were significantly different from control group results (p<0,01). This study suggests that the fall in maternal plasma progesterone which occurs at the time of parturition may play a role in the increase in MBF that occurs prior to the onset of labor, delivery, and lactogenesis. (AM. J. OBSTET. GYNECOL. 132: 385, 1978).	
Palavras-Chave: 	Blood supply; Regional Blood Flow.	
Thesagro: 	Circulação Sangüínea; Endocrinologia; Glândula Mamaria; Ovino; Prenhez; Progesterona; Reprodução.	
Thesaurus Nal: 	Mammary glands; Pharmacology; Pregnancy; Progesterone; Reproduction; Sheep.	
Categoria do assunto: 	H Saúde e Patologia	
Registro original: 	Embrapa Caprinos e Ovinos (CNPC)	
Exemplares: 	CNPC - (7992-1) - ADD - AP - DD -  -  -  - DIS