Abnormalities of the powers uterine inertia 4. Effect on maternal and fetus maternal fatigue acidosis infection postpartum hemorrhage cesarean section rate fetus birth injury distress prolapse of umbilical cord stillbirth RENJI HOSPITAL11 RENJI HOSPITAL Abnormalities of the powers -----uterine inertia 4.Effect on maternal and fetus maternal fatigue acidosis infection postpartum hemorrhage cesarean section rate fetus birth injury distress prolapse of umbilical cord stillbirth