If the placenta and membranes are delivered after delivery and the membranes are incomplete, the midwife should wear gloves again and perform manual removal after disinfection. If the residual membranes are tightly adherent to the uterine wall and it is difficult to remove the membranes manually, an attempt can be made to remove the membranes by entering the uterine cavity with oval forceps. If all the above methods fail, it is recommended to give daily intramuscular injection of uterine contraction after delivery to promote uterine contraction, and then perform ultrasound after a week when the uterus contracted and the uterine cavity is smaller and the membranes are still not expelled from the body, and then perform clearance surgery to avoid massive postpartum bleeding and intrauterine infection causing damage to the mother.