Maternal blood hypercoagulation takes about 2-4 weeks to recover after termination of pregnancy, which may vary from person to person. During pregnancy and after delivery, the blood in the body undergoes significant changes, with an increase in blood volume and a state of hypercoagulation. With the termination of pregnancy, the blood system changes accordingly. In the early puerperium, the blood is still in a hypercoagulable state, which is conducive to the formation of thrombus at the placental abruption wound and reduces the amount of postpartum hemorrhage. Fibrinogen, thrombin, and prothrombin drop to normal within 2-4 weeks after delivery, so their hypercoagulable state changes accordingly. If the mother in the postpartum months recommended appropriate activities, do not absolute bed rest, such as dyspnea, chest pain and other symptoms, is considered to be the occurrence of pulmonary embolism, it is recommended to seek medical attention in a timely manner, under the guidance of the doctor, improve the relevant examination, to clarify the cause of the disease, symptomatic treatment.