Fetal heart rate monitoring at 34 weeks, once a week, is recommended for a normal pregnancy without any risk factors. If the pregnant woman is a high-risk pregnancy with complications or comorbidities during pregnancy, it is recommended that fetal heart monitoring be performed earlier, and may need to be performed from 28 weeks onwards. Fetal heart monitoring is used to evaluate the growth and development of the fetus and whether the fetus is hypoxic in the uterus by continuously recording and observing the fetal heart rate and contraction changes. Fetal heart monitoring is performed by continuously monitoring the fetal heart for 20 minutes, and the fetal heart rate is judged to be normal if it is between 110-160 beats per minute. In addition, the fetal heart rate should have good variability, and the presence of effective acceleration of the fetal heart after fetal movement without recurrent deceleration of the fetal heart indicates that it is less likely that the fetus is suffering from hypoxia in the uterus. Fetal heart examination usually takes about 20 minutes, so avoid poor rest, improper diet, excessive fatigue, etc., before checking the fetal heart. Before checking the fetal heart, it is best for the pregnant woman to urinate first, then lie flat on the bed and cooperate with the doctor to check. If the baby is not willing to move, it may be sleeping, so the pregnant woman can walk back and forth or play soft music to wake up the baby.