Enoxaparin sodium does not exist to say how long is the best for pregnant women, enoxaparin sodium is used for fetal preservation during the injection of about 2 to 5 days to stop, used for deep vein thrombosis treatment can be based on blood coagulation to determine the time of use, the specific use of how long to use according to the pregnant woman’s physical condition to judge. Enoxaparin sodium belongs to the low molecular heparin, is an anticoagulant drug, during pregnancy can improve blood circulation, anticoagulation and antifibrinolytic system, the occurrence of preeclampsia can be used for fetal preservation treatment, can be used for deep vein thrombosis treatment, but also can be used for the treatment of patients with high D-dimer during pregnancy. During pregnancy with preeclampsia, use Enoxaparin sodium under the guidance of a doctor to preserve the fetus, the drug will make adjustments and changes to the whole state of the body, can reduce vaginal bleeding, the first injection for 2-5 days to observe the use of the drug, the condition can be effectively controlled can stop the drug. During pregnancy, the blood system is in a state of high coagulation, which may cause deep vein thrombosis, and can be treated with enoxaparin. During the treatment, the blood coagulation status needs to be monitored to determine the duration of the medication, and the duration of the medication is different for each pregnant woman with a different state of her body, and the appropriate duration of the medication varies from one person to another. Enoxaparin sodium should be used under the guidance of a doctor during pregnancy, and should not be used blindly by oneself.