Maternal complications of severe placental abruption include hemorrhagic shock, acute renal failure, disseminated intravascular coagulation, and amniotic fluid embolism. Fetal complications, such as intrauterine distress, intrauterine fetal death, neonatal asphyxia, neurological developmental defects. 1. Maternal complications: Heavy placental abruption has a large amount of bleeding, and the pregnant woman may suffer from hemorrhagic shock. The large amount of bleeding will also cause insufficient blood supply to the kidneys, which will lead to acute renal failure. Placental abruption can lead to uteroplacental stroke, resulting in coagulation disorders, leading to increased risk of disseminated intravascular coagulation and amniotic fluid embolism. 2. Fetal complications: Placental abruption may lead to intrauterine ischemia and hypoxia, triggering fetal distress, and in severe cases, even intrauterine fetal death. The rate of asphyxia in newborns after birth is elevated, and serious sequelae such as neurological developmental defects and cerebral palsy may also occur. In clinical practice, pregnant women need to seek timely medical attention once placenta previa occurs, in order to minimize the complications of mother and child.