Where: P=predicted probability of VTE; Csec=Cesarean section (CD), enter 1 if CD, enter 0 if vaginal delivery; BMInew=Maternal BMI on admission, enter continuous BMI value; Prediab=Pre-gestational diabetes, enter 1 if present, 0 if absent; Heartdis=Chronic heart disease, enter 1 if present, 0 if absent; Preeclamp=Preeclampsia, enter 1 if present, 0 if absent; Bloodtrans=Blood transfusion, enter 1 if present, 0 if absent; Antethrombo=Prenatal history of thromboembolic disorder, enter 1 if present, 0 if absent; momLOS=Maternal length of stay, enter continuous LOS value (in days).