Whether the fetal heart rate of 164 beats/min is normal depends on the situation. Generally, the fetal heart rate is 120-160 beats/min. The fetal heart rate is normally between 120 and 160 beats/min. If the pregnant woman is emotional or lifting heavy objects, there may be transient uterine contractions, resulting in occasional fetal heartbeat acceleration, but it is not continuous and the frequency of the episodes is very low. However, if the fetal heart rate is always greater than 160 beats per minute, it should be considered as an abnormality and it is likely that the fetus is in intrauterine distress. Intrauterine distress can be caused when the maternal blood is not oxygenated enough and when there is an obstacle to the transport and exchange of oxygen between mother and fetus, which is manifested by a fetal heart rate greater than 160 beats/min and lasts for more than 10 minutes. In chronic fetal intrauterine distress, the pregnant woman should, according to the instruction, take the left lateral position to increase the placental blood flow, while receiving oxygen on time, actively treating various complications, closely monitoring the fetal development and prolonging the pregnancy cycle as much as possible. When acute fetal intrauterine distress develops or chronic distress cannot be improved, pregnant women should terminate the pregnancy quickly after promoting fetal lung maturation.