Higher Risk of Venous Thrombosis During Early Use of Oral Contraceptives in Women With Inherited Clotting Defects

Abstract

Women with inherited clotting defects who use oral contraceptives develop venous thrombosis not only more often but also sooner than do those without inherited clotting defects. Venous thrombosis in the first period of oral contraceptive use might indicate the presence of an inherited clotting defect.