D-dimer mainly reflects the fibrinolytic function, which is mainly caused by the coagulation disorder in the body, and can effectively detect the presence of thrombosis. If the D-dimer of pregnant women is high, it may be normal, but it may also be a case of thrombosis or secondary fibrinolytic function, which requires specific analysis of specific problems: 1. Normal phenomenon: If high D-dimer is found after the examination of pregnancy, it is generally normal and does not need treatment. The level of estrogen and progesterone in women’s body is high after pregnancy, coagulation factors and fibrinogen will increase, while the level of antithrombin has decreased, resulting in a high coagulation state of blood, so it will present a high D-dimer state, which can prepare for future delivery to reduce the amount of bleeding; 2, abnormal phenomenon: if the placenta is locally ischemic, there will be a certain amount of trophoblast fragments with the blood flow into the blood circulation, dissolving Secretion of a large amount of thrombin, prompting blood clotting and thrombosis, or because of diseases such as DIC (Disseminated Intravascular Coagulation), fibrin is produced in large quantities, causing secondary fibrinolytic hyperfunction, which can lead to elevated D-dimer. Therefore, if a pregnant woman’s test shows high D-dimer, she must pay attention to regular maternity checkups and live on a light, low-fat, low-salt diet. If you need to take medication to control it, you should take the appropriate medication under the guidance of your doctor.