In patients with preeclampsia and severe disease, generally defined as severe hypertension (systolic blood pressure ≥160 mm Hg or diastolic blood pressure ≥110 mm Hg), thrombocytopenia (platelet count <100,000/µL [100 × 109/L]), kidney dysfunction (serum creatinine concentration >1.1 mg/dL [97.2 µmol/L] or doubling of the serum creatinine concentration in the absence of other kidney disease), impaired liver function (elevated blood concentrations of liver aminotransferases to twice the normal concentration), pulmonary edema, or cerebral or visual symptoms, management decisions are usually made based on the balance of fetal and maternal risk with the implications of preterm delivery.