Regular contractions in the second trimester indicate that the baby is about to be born. If you reach your due date or about 2 weeks before your due date, regular contractions are normal and you should not be too nervous. In the early stages of regular contractions, the pain will last for about 30 seconds once every 5-6 minutes. As time goes by, the pain time will gradually increase and the interval between contractions will gradually shorten until the birth of the fetus, about 1 minute of continuous pain time and 1 minute of interval time, the opening of the uterus will be fully opened and the fetus will be delivered, during this period you should pay attention to the fetal heartbeat and fetal movement changes.