ADRB1 and preeclampsia: We estimated effects of target modulation on six primary and eight secondary pregnancy outcomes.<h4>Results</h4>Genetically instrumented downregulation of blood pressure through β-blocker (BB) and calcium-channel blocker (CCB) targets, particularly ADRB1 and CACNB2, was associated with a reduced risk of hypertensive disorders of pregnancy, including preeclampsia.