It is possible to have an early or late due date, which is determined by the woman’s health and the condition of the baby. The due date is usually the 40th week of pregnancy and is calculated from the first day of the woman’s last menstrual period. If the menstrual cycle is early or late, the due date will also be early or late. In addition, maternal factors and fetal factors can also cause early and postponed due dates, such as sudden abnormal conditions or stimulation of the mother’s body, which may lead to early delivery, or the head of the fetus cannot enter the pelvis due to the oversized head of the fetus, which may also lead to postponed delivery. A fetus born after 24 weeks of gestation may survive, but its viability is poor; after 28 weeks, the survival rate gradually increases; and a full-term mature baby is born between 37 and 42 weeks. If the fetus is in a normal condition, you can wait for the contractions to start and wait for the delivery. If the expected date of delivery is more than 1 week and there is no effective contraction, you should go to the hospital for a timely checkup, combine with the doctor’s opinion and comprehensive assessment of the mother, assist intervention if necessary, and deliver as soon as possible to avoid the impact on the fetus.