Table 2.

Risk factor for development of VTE.

(1) Previous history of thrombosis

(2) Primary thrombophilia (e.g., factor V Leiden)

(3) Caesarean section delivery esp. emergency section during labour

(4) Sickle cell disease

(5) Mechanical heart valve

(6) Smoking

(7) SLE

(8) Atrial fibrillation

(9) Inflammatory bowel disease

(10) Nephrotic syndrome

(11) Antiphospholipid syndrome

(12) Prolonged immobilization (e.g., bed rest)

(13) Recent major surgery or trauma

(14) Age over 35 years

(15) Obesity (BMI > 30 kg/m2)

(16) Multiparity over 4 deliveries

(17) Preeclampsia

(18) Current infection

(19) Complications of pregnancy such as antepartum or postpartum hemorrhage, hyperemesis gravidarum, condition requiring blood transfusion, and fluid-electrolyte imbalance