Gestation 37 weeks -41 weeks is full-term labor, so pregnancy 38 weeks cesarean section is full-term labor, less than 37 weeks greater than 28 weeks is premature labor, ≥ 42 weeks is called overdue labor. 1. Preterm labor: it can be manifested as regular contractions, accompanied by progressive shortening of the cervical canal; cervical dilatation of 1cm or more, and infants and young children may suffer from cerebral palsy, respiratory distress, etc. Therefore, it is necessary to have regular prenatal checkups and find out the risk factors of preterm labor as early as possible in order to prevent preterm labor. 2. Overdue labor: For pregnant women who are over 41 weeks old, the incidence of overdue labor is reduced by active treatment. Overdue labor may lead to fetal distress, meconium aspiration syndrome, asphyxia, etc., and maternal injuries are significantly increased. The delivery of the fetus should be analyzed in a comprehensive manner to determine whether it is suitable for delivery in order to minimize the damage to the fetus and the mother.