The normal heart rate of the fetus should be between 120 and 160 beats per minute. If the heart rate is 160 beats, it is normal and there is no need to worry too much. It is possible that the uterus is stimulated by the fetus’ activity, causing uterine contractions. After the physiological contraction of the uterus, the fetal heart rate will appear slightly fast, and may reach 180 beats once in a while, after the contraction of the uterus stops, pay attention to rest, can ease back to 160 beats, also belongs to the normal performance, do not need to be too nervous. The frequent contractions of the uterus can affect the growth of the fetus and may cause intrauterine ischemia and hypoxia in severe cases. If under normal circumstances, the heart rate does not exceed 160 beats and the minimum is not less than 120 beats, no special treatment is needed.