Sulfadoxine Heparin Sodium is given to improve blood clotting and prevent blood clots. Sulfadoxine Heparin Decyl Sodium is a synthetic drug anticoagulant that selectively inhibits coagulation factor X for the purpose of inhibiting thrombin generation and preventing blood clots from increasing in size. If the pregnant woman herself suffers from immune system disease, she may have abnormal coagulation function during pregnancy and needs to be injected with Sulfadoxine Heparin Sodium in order to anticoagulate and promote blood circulation around the placenta so that the fetus can grow and develop normally. If the pregnant woman has a history of thrombosis, hypercoagulability during pregnancy can lead to slowing down of blood circulation and easy formation of blood clots, especially intra-placental micro-thrombosis, the injection of sodium sulfadoxinephedrine can prevent the formation of blood clots and achieve the purpose of preserving the fetus. However, it should be noted that sulfadoxine heparan decanoate sodium must be used only under the guidance of a doctor to avoid adverse effects on the pregnant woman and the fetus.