Fetal heart monitoring has been around 150 beats very smoothly, if it lasts for 20 minutes or less is normal, and if it lasts for more than 20 minutes without fetal heart acceleration, it is not normal. Normal fetal heart rate is 110~160 beats/minute, and fetal heart monitoring is a test to observe whether the fetus is lacking in oxygen and whether the fetal movement is abnormal, and it is usually recommended to do it once a week in late pregnancy. After fetal heart monitoring, you need to observe whether the baseline of fetal heart is normal or not, and the fetal heart rate between 110~160 beats is normal. However, if there is no fetal heart acceleration during fetal heart monitoring, it is not normal. Continuing for 20 minutes without 2 or more fetal heart accelerations, it needs to be done for another 20 minutes, and if there is no acceleration all the time, it is not normal. Whether the fetal heart rate of 150 beats per minute is normal or not, it needs to be judged after the doctor’s interview and the related examinations.