Enoxaparin sodium is mainly used for the prevention of venous thromboembolic diseases, and is now often used in obstetrics for the treatment of fetal preservation. Enoxaparin sodium has good effect in addition to fetus preservation, it has certain side effects on the body, and must be used in accordance with medical advice. The role and side effects of enoxaparin sodium 1, role: platelet aggregation, poor uterine blood circulation, previous history of unexplained fetal abortion pregnant women, you can use enoxaparin sodium to improve the uteroplacental blood circulation, conducive to the development of embryonic implantation, thus playing a role in the preservation of fetus. For pregnant women with high coagulation status such as easy embolism, they should always use enoxaparin sodium to preserve the fetus and avoid the symptoms of thrombosis, such as placental thrombosis and umbilical cord thrombosis, to avoid the risk of fetal death in utero; 2. Side effects: it may affect the coagulation function, and attention should be paid to check the coagulation function during the treatment with the drug. There is a certain impact on liver and kidney function, so a comprehensive assessment of liver and kidney function should be made before use, and attention should be paid to monitoring during the use of the drug, and discontinue the drug as prescribed by the doctor in case of discomfort. Precautions 1, regular maternity checkups, keep track of the fetus and the physical condition of the pregnant woman; 2, regular rest and diet, maintain the mood, avoid excessive stress; 3, avoid strenuous activities, use the drug to regularly test the coagulation function.