Fetal heart rate does not differentiate the sex of the fetus. There is no relationship between fetal heart rate and the sex of the fetus, and hearing fetal heart sounds only confirms pregnancy and that the fetus is alive. The fetal heartbeat can be detected by Doppler at 12 weeks of gestation, and can be heard with a normal stethoscope at 18 to 20 weeks of gestation. Fetal heart sounds are biphasic and fast, and a fetal heart rate of 110 beats/min to 160 beats/min is generally considered normal. If the fetal heart rate is above 160 beats/minute or below 110 beats/minute, it may be abnormal and should be examined and treated accordingly. It is recommended to pay attention to balanced nutrition during pregnancy, pay attention to diet, moderate exercise, avoid physical exertion, and go to the hospital for regular checkups.