Ÿ Platelet count: >100,000/mL = 0, <100,000/mL = 1, <50,000/mL = 2

Ÿ Prolonged prothrombin time or international normalized ratio: <25% increase = 0, 25% - 50% increase = 1, >50% increase = 2

Ÿ Fibrinogen level: >200 mg/L = 0, <200 mg/L = 1

A score ≥ 3 is compatible with overt disseminated intravascular coagulation in pregnancy