The presence of back pain at 38 weeks of pregnancy is an indication of an aura of labor. Only when regular contractions start is it a sign of a real birth. During this period of back pain, if there is no water breakage or redness, you can walk and move around more in moderation, go up and down stairs or do deep squats, which can promote the smooth birth of the fetus and the contraction of the uterus. During this period, you should pay attention to the changes of fetal heartbeat and fetal movement. Only when there are regular contractions, this means that the mouth of the uterus is in a state of opening and the baby is really going to be born. Regular contractions will occur once every 3-5 minutes, and the pain will be accompanied by a hardening of the stomach. It takes about 11-13 hours for a new mother to go from regular contractions to full opening of the uterus.