If the fetal movement does not stop for an hour, it is not normal, the fetal movement will be too frequent when the fetus is lack of oxygen in the uterus. Under normal circumstances, the number of fetal movements should not exceed six times per hour, if it exceeds six times, it belongs to intrauterine hypoxia, you should go to the hospital for examination in time, you also need to pay attention to do fetal heart monitoring, if it is confirmed that there is intrauterine hypoxia, you should give the pregnant woman oxygen in time to relieve the symptoms. If the fetus is hypoxic for a long time, it may lead to fetal hypoxic encephalopathy, which may lead to limb disorders, abnormal development and mental retardation after birth. Prolonged lack of oxygen may also lead to intrauterine asphyxia or premature birth.