Complications of severe early placental abruption include disseminated intravascular coagulation, hemorrhagic shock, amniotic fluid embolism, acute renal failure, and fetal death in utero. 1. Disseminated intravascular coagulation: Clinical manifestations include bleeding from skin, mucous membrane and injection site, vaginal bleeding without coagulation or soft coagulation clot, and even hematuria, hemoptysis and vomiting of blood may occur. 2. Hemorrhagic shock: when the amount of bleeding is large, it may lead to shock. 3. Amniotic fluid embolism: amniotic fluid can enter into the blood circulation of pregnant women through the open uterine blood vessels on the peeled surface of the placenta, thus leading to amniotic fluid embolism. 4. Acute renal failure: when placenta previa bleeds heavily, the kidneys will be severely defective, resulting in necrosis of renal tissues. 5. Fetal death in the uterus: If the area of placental abruption is too large, and the site of placental abruption is located at the root of the umbilical cord, etc., it will lead to a decrease in the blood supply to the fetus, and fetal ischemia and hypoxia will result in fetal death in the uterus. The prognosis of placental abruption mainly depends on the degree of placental abruption, the larger the area of abruption, the worse the prognosis. Seek medical attention if you experience any discomfort during pregnancy so as not to miss out on your medical condition.