Pregnant women with thrombosis need to have blood drawn for routine blood tests, coagulation tetramers, D-2 aggregates, etc. 1. Platelets in blood routine program, the normal range is 100~300×10^9/L, reflecting the coagulation status of the body. 2. The four items of coagulation include prothrombin time, activated partial thromboplastin time, fibrinogen, and prothrombin time, which can be used to detect diseases such as deep vein thrombosis. Because pregnant women are prone to swelling of the lower limbs in the late stage of pregnancy, if they have little exercise and spend a lot of time in bed, it is very easy to form thrombosis of the lower limbs. 3. D-dimer is also a common test for thrombosis. Negative D-dimer is an important test to exclude deep vein thrombosis and pulmonary embolism, while positive D-dimer is a useful test to diagnose disseminated intravascular coagulation and observe thrombolytic therapy. If the patient has uncomfortable symptoms, please consult a doctor immediately and follow the doctor’s instructions to carry out the appropriate tests to clarify the diagnosis and active treatment.