The normal range of fetal heart rate is between 120 and 160 beats per minute. The fetal heart is not mature before 20 weeks of pregnancy, so the fetal heart rate is usually at 162 beats/minute. As the weeks of pregnancy increase, the fetal heart gradually develops and matures, and the fetal heart rate stabilizes, with 147 beats/minute in the 21st to 30th weeks and an average of 139 beats/minute in the 40th week. In the early stages of pregnancy, you can go to the hospital for regular ultrasound examinations to determine whether the fetal heart rate is normal. In the later stages, you can have regular fetal heart monitoring. If abnormal fetal heartbeat occurs, it may be caused by intrauterine hypoxia, you can maintain a good living environment, open the windows for ventilation, and if necessary, you can follow the doctor’s advice to relieve oxygen in time to avoid adverse effects on the growth and development of the fetus. Once the fetal heart abnormalities, it is recommended to consult a doctor in a timely manner, complete the relevant examinations, under the guidance of a professional doctor to clarify the cause of the disease, and actively deal with it.