D-dimer is also known as D-dimer, pregnant women who are about to give birth to D-dimer suddenly elevated need to be dealt with according to the degree of elevation, if mildly elevated, within 2-3 times the upper limit of the normal range, regular observation can be done; if the elevation is more than the upper limit of the normal range of 5-10 times, it suggests that the body’s blood coagulation system is over-enhanced, and the need for the use of anticoagulant drugs. 1. Mild elevation: Most pregnant women will have mild elevation of D-dimer during pregnancy, which is due to the high coagulation state of the blood system after pregnancy, and it is a physiological change. Generally, the degree of elevation is within 2-3 times of the upper limit of the normal range, which does not need to be treated, and it can be observed on a regular basis. 2. Severe elevation: If D-dimer is elevated more than 5~10 times of the upper limit of the normal range or higher, it may indicate that the blood coagulation system of a woman’s body is over-enhanced, which may easily increase blood clots, affecting the mother and the fetus. Anticoagulant medication, such as dalteparin sodium injection, needs to be used under medical supervision, but there may be a risk of hematoma. The administration of spinal or epidural anesthesia or vertebral puncture is prohibited when receiving high doses of dalteparin. If a pregnant woman is approaching labor with a sudden increase in D-dimer, there may also be other causes, and prompt medical attention is recommended.