Under normal circumstances, it is normal to give birth two weeks earlier or two weeks later on the wrong side of the pregnancy week. Under normal circumstances, a fetus is considered full term at 40 weeks, so two weeks early is 38 weeks. If the baby is delivered within 38 weeks and 42 weeks, it is a normal birth and a full-term birth. If it is less than 38 weeks, it is premature, so if the baby is born at 38 weeks, it is not premature. If it is above 28 weeks, the chance of survival of preterm birth to 38 weeks will be higher; if it is less than 28 weeks, the chance of survival of the embryo will be very low. Generally, the more weeks of gestation in preterm babies, the higher the survival rate of the embryo. Therefore, to make a fetus less than 38 weeks to deliver, these are considered preterm babies. The care of preterm babies must go to the hospital for detailed examination and treatment, and the preterm babies can go home only after all are normal.