The fetal heart sounds are listened with a fetal heart stethoscope to get the approximate heart rate of the fetus, usually within 110-160 beats per minute is within the normal range. The fetal heartbeat can be heard through a fetal heart stethoscope in the abdomen of the pregnant woman after 16 weeks of gestation, and after 20 weeks, the fetal heartbeat can be heard more clearly, and after 32-34 weeks, electronic monitoring of the fetal heartbeat can be performed to understand more accurately the situation of the fetus in the uterus. To determine whether the fetal heart sounds are normal, we need to measure the average level of fetal heart rate within 10 minutes, excluding fetal heart acceleration, fetal heart deceleration or significant fetal heart variation, etc. Usually within 110-160 beats/min is within the normal range. If the baseline fetal heart rate is greater than 160 beats/minute for 10 minutes, it is called fetal tachycardia; if the baseline fetal heart rate is less than 110 beats/minute for 10 minutes, it is called bradycardia. Usually, before listening to the fetal sound, we can let the pregnant woman rest for half an hour to adjust her emotion and condition to avoid affecting the fetal heart sound; if the fetal heart sound is still too fast or too slow, we need to consider whether the fetal development is abnormal, such as hypoxia, intrauterine infection, amniotic fluid abnormalities, etc., which can be further clarified by ultrasound, and if necessary, perform cesarean section to terminate the pregnancy, do a good job of neonatal rescue and resuscitation to ensure the safety of the pregnant woman and the fetus The newborn should be rescued and resuscitated to ensure the safety of the mother and fetus.