Weak thrombophilia indicates heterozygous FVL or PGV; potent thrombophilia, antithrombin deficiency, homozygous FVL, homozygous PGV, or combined deficiencies.

*Consider higher doses of prophylactic LMWH and/or adding intermittent pneumatic compression devices.

†Other risk factors indicates that it remains to be validated whether combinations of other risk factors for postpartum VTE including family history of VTE, prior superficial phlebitis, weak thrombophilia, or moderate-risk thrombophilias (asymptomatic anti-phospholipid antibodies, protein C deficiency, protein S deficiency), emergency C-section, postpartum infection, postpartum hemorrhage, smoking, BMI >25 kg/m², intrauterine growth restriction, preeclampsia, stillbirth, varicose veins, inflammatory bowel disease, preterm birth, and age >35 years) are high enough risk to warrant postpartum prophylaxis.