RT Journal Article SR Electronic T1 A COMPARISON OF THE CATECHOLAMINE CONCENTRATIONS OF UTERI FROM SEVERAL SPECIES AND THE ALTERATIONS WHICH OCCUR DURING PREGNANCY JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics SP 9 OP 13 VO 148 IS 1 A1 Keung-Sup Cha A1 Woo-Choo Lee A1 A. Rudzik A1 J. W. Miller YR 1965 UL http://jpet.aspetjournals.org/content/148/1/9.abstract AB The catecholamine content of uteri from rats, rabbits and humans was characterized by a high fractional concentration of epinephrine relative to norepinephrine. The concentration of epinephrine was greater than that of norepinephrine in the human uterus. The concentrations of epinephrine in the uterus were elevated during estrus in the rat and during the proliferative phase of the menstrual cycle in the human. During pregnancy, the concentrations of both epinephrine and norepinephrine were reduced. The Williams & Wilkins Comapny