High D-dimer is generally a normal physiological phenomenon during pregnancy and does not require special treatment, pregnancy is a state of stress, there will often be an increase in white blood cell count, D-dimer elevation, fibrinogen elevation and other non-specific reactions, most of which are normal physiological phenomena do not need to be dealt with. Of course, if D-dimer elevation is accompanied by clinical signs of thrombosis, we need to exclude the risk of thrombosis, for example, pregnant women with D-dimer elevation accompanied by dyspnea should exclude the possibility of pulmonary embolism, which is very rare, and if D-dimer elevation is accompanied by unilateral swelling and pain in the lower limbs, we need to exclude the possibility of thrombosis in the lower limbs.