Expert:Sarah Little, MD, Obstetrician at Brigham and Women’s Hospital Deep Vein Thrombosis during pregnancy is a serious medical condition. DVT occurs when a blood clot forms in a vein usually in the pelvis or leg. Several things can increase the risk of Deep Vein Thrombosis, including: pregnancyoral contraceptive useobesitybeing sedentarysurgery Are there warning … [Read more...] about Why is Deep Vein Thrombosis more common during pregnancy?