High D2 polymer in early pregnancy means that the blood of pregnant women is in a state of hypercoagulability, which may be physiologically high, or caused by thrombosis, epilepsy and other related diseases. 1. Physiological: Pregnant women are special people, compared with non-pregnant people, pregnant women’s blood is in a state of hypercoagulability, with the increase of gestational weeks, D2 polymer will be further elevated, but generally not too much. 2. Pathological: If the D2 polymer of pregnant women is abnormally high, then we need to pay attention to whether the coagulation function is abnormal, or suffering from thrombosis, epilepsy and other related diseases. Pregnant women with high D2 polymers need to consult a doctor in time and have regular checkups. At the same time to moderate exercise, to prevent the formation of lower extremity venous thrombosis.