The incidence of venous thromboembolism (VTE) in pregnant women is significantly higher than in women of a similar age who are not pregnant. Risk associated with VTE is primarily a result of hypercoagulability induced by hormonal changes. Important risk factors to consider include: increased venous stasis; pregnancy and delivery complications; a personal history of thrombosis; and inherited or acquired thrombophilia. The risk of recurrent VTE in pregnancy is also high. Diagnosis of deep vein thrombosis (DVT) in pregnant patients is usually performed by compression ultrasonography in parallel with D-dimer testing.