If the baby does not start four days before the due date, do not be too nervous, because the due date is only an approximate date, half a month earlier or half a month later than the due date is normal performance. When the baby has not started four days before the due date, you can check the fetal heartbeat and fetal movement on time, and you should also check the amniotic fluid volume in the uterine cavity through ultrasound in time, if the value is normal, you can wait for the delivery without worry. If the fetal heartbeat is not normal or the fetal movement is not normal, and if the amniotic fluid is low or cloudy, you should take symptomatic treatment measures in time.