D-dimer is an indicator of coagulation. An elevated D-dimer concentration in a test subject generally indicates that her blood is in a hypercoagulable state. However, the blood of pregnant women is in a physiological hypercoagulable state, and a slight increase in D-dimer concentration may occur, which is a physiological phenomenon and does not require special treatment. Pay attention to adjusting the diet structure, and try not to eat fried or deep-fried food. Do not eat pickles, sauces, brines and other high-salt diet, and eat more foods rich in dietary fiber, such as bananas, kelp, onions, etc. Pay attention to improving your lifestyle by doing appropriate physical activities such as walking every day. If the D-dimer concentration is significantly elevated, it is an abnormal sign, and pregnant women are considered to be at risk of thromboembolic disease and should be treated with reasonable and correct anticoagulants under the guidance of a doctor.