Whether a baby is born earlier or later than the due date depends on the condition of the pregnant woman. Each pregnant mother’s condition is different, so it cannot be said uniformly whether the baby is born earlier or later than the due date. Generally, for pregnant mothers with regular menstruation, 40 weeks of menopause is the due date, 37 weeks is a full-term baby, and 42 weeks is an overdue baby. At about 35 weeks of menopause, the fetal lungs are basically developed and mature, and at 37 weeks, the baby’s developing organs are very mature, and the baby comes out at this time, and the chance of survival is also very high. In terms of weeks of gestation, a baby at 37 weeks is a full-term baby. Labor, from 37 weeks to 42 weeks are the normal range of delivery, for doctors do not recommend regeneration after 42 weeks, because the overdue baby may have muddy amniotic fluid, fetal distress, so by 41 weeks there is no delivery, will be hypnobirthing.