When the pregnancy is five months, the unconscious shaking under the chest indicates the appearance of fetal movement, at this time it is normal, do not worry too much. Five months pregnant, the position of the uterus in the lower abdomen, at this time the fetus has obvious fetal movement, but due to more amniotic fluid in the stomach, the position of the fetus to occur fetal movement is not fixed, it will be manifested as abdominal shaking, the abdomen is located under the chest, so five months pregnant when this situation is normal. At this time, pregnant women should pay attention to the number of fetal movement, under normal circumstances, fetal movement occurs 3 to 5 times an hour, if the number of fetal movement is too much indicates that the fetus lacks oxygen, the number of fetal movement is too little or even not moving indicates that the fetus may have suffocation. If pregnant women find abnormal fetal movement, it is recommended to consult a doctor in time to avoid delaying the condition.