Mothers can prevent pulmonary embolism through moderate activity and monitoring blood clotting. 1. Moderate activity: avoid prolonged bed rest, move the lower limbs moderately, and take a walk when physical strength is restored to promote blood circulation and reduce blood stagnation, thus reducing the risk of thrombosis. 2. Monitoring blood coagulation status: mothers can undergo tests such as coagulation quadruple test and D2 polymer test to determine whether the blood is in the pre-thrombosis stage, and if there is such a risk, timely monitoring and treatment can be carried out. Mothers should undergo regular obstetric examination. If the risk of pulmonary embolism formation is found to exist, reasonable methods of treatment should be adopted under the guidance of doctors to prevent pulmonary embolism if necessary.