“…j8-Adrenergic agonists are weak vasodilators in the uterine vascular bed of nonpregnant (Barton et al, 1974;Greiss and Gobble, 1967;Resnik et al, 1976) and pregnant ewes (Erkkola et al, 1981;Hasaart and de Haan, 1987). The vascular response to j8-adrenergic agonists is reduced in pregnant animals (Erkkola et al, 1981).…”