to investigate the role of components of the renin-angiotensin-aldosterone system and plasma progesterone concentrations in the pathophysiology of hypertension in pregnancy , sequential measurements were made throughout pregnancy in 45 normotensive subjects , 41 other pregnant patients in whom hypertension became manifest only during pregnancy and 26 patients with chronic hypertension antedating pregnancy .
C0033308
progesterone
C0032961
pregnancy