Normal contractions have a certain rhythm, polarity and consistency, and have a corresponding intensity and frequency. When abnormalities occur, they are called labor abnormalities and are divided into three types: weak contractions, uncoordinated contractions and hyperactivity, with weak contractions being the most common. Differential diagnosis of labor abnormalities: I. Lack of contractions Lack of uterine contractions is a labor abnormality. According to the time of occurrence, it can be divided into primary contraction weakness (appearing at the beginning of labor) and secondary contraction weakness (appearing after the opening of the uterus 3cm into the active phase). Two different consequences can occur according to the symmetry of the head and pelvis. 1, strong and frequent contractions, such as no head-pelvic asymmetry, the opening of the uterus is often rapidly opened, the first dewlap rapidly descending, the whole process of fetal delivery can be completed within 3 hours, called “emergency delivery”, mostly seen in menstruating mothers. Because the delivery is too fast, it often leads to surprise, and is prone to serious birth canal injury, placenta or fetal membrane residue, postpartum bleeding and infection. Due to frequent contractions, the placental blood circulation is affected, and fetal distress, stillbirth or neonatal asphyxia may occur. In addition, the fetal head passes through the birth canal too quickly, which can also cause intracranial injury. If not enough attention is paid, the fetus may fall to the ground and bleed when the umbilical cord is broken. For those who have strong contractions and a history of emergency delivery, they should be observed and prepared for delivery in advance, and they should also be prepared to prevent postpartum hemorrhage and emergency neonatal asphyxia. If the contraction is too strong, oxygen inhalation or intramuscular injection of atropine 0.5mg can be given to prevent the fetal life from being affected by placental blood circulation. In case of poor sterilization, both mother and child should be given antibiotics to prevent infection and, if necessary, tetanus antitoxin injection to the infant. Carefully check the birth canal after delivery and closely observe the newborn for intracranial hemorrhage and infection. 2, if the delivery is obstructed due to cephalopelvic disproportion or for other reasons, the uterus can have tonic contractions, with excessive contractions and contractions in the upper segment, becoming hypertrophic, and extremely thin and painful in the lower segment. Because of the huge difference in thickness between the upper and lower part of the uterus, a ring-shaped shallow groove may appear at the junction, called “pathological contraction ring”, which is the precursor of uterine rupture, and is often accompanied by hematuria, if not treated in time, uterine rupture will occur. If the fetus is alive, the uterus can be dissected, and if it is dead, the fetus can be destroyed as appropriate.