B. Seat belt compression.
C. Pre-term labour.
A woman shown in the photograph above going on a long journey with prolonged sitting may develop thromboembolism as proronged sitting mav cause venous stasis in pregnancy.
Pregnancy increases the risk of venous thromboembolism (VTE) 4- to 5-fold over that in the nonpregnant state. The 2 manifestations of VTE are deep venous thrombosis (DVT) and pulmonary embolus (PE).