Venous thromboembolism among new users of different oral contraceptives.

Herings, R M; Urquhart, J; Leufkens, H G · Lancet · 1999

retrospective_cohort · Level III

Where this comes from

Abstract

New use of third generation oral contraceptives is associated with a four-fold increased risk of venous thromboembolism compared with users of second generation oral contraceptives, particularly among young, healthy women.

Medical subject headings