Babies are best born between 37 and 42 weeks after conception. The calculated due date is 40 weeks of pregnancy, between the first 3 weeks and the last 2 weeks of the due date, all births in this interval are considered normal births. 37 weeks after the baby’s organs have matured, and the surface-active substances of the lungs are sufficient to maintain their survival in the outside world, so it is a full-term pregnancy. Babies beyond 42 weeks we become overdue babies and may be at risk of hypoxia, amniotic fluid contamination, etc., so births after 42 weeks are not recommended. And at 28 weeks to 37 weeks the child belongs to the preterm baby, lung function and other development is incomplete, there is an increased probability of respiratory diseases, neonatal jaundice, hypoglycemia. When you are about to give birth, it is recommended that you walk around more and climb stairs appropriately to help smooth labor. Of course, the most important thing is to take regular and on-time checkups to let the doctor know about the status of yourself and your fetus.