Fetal heart rate has nothing to do with the character of the fetus, but the speed of the fetal heart rate can reflect whether the fetus has hypoxia in the uterus. Fetal heart rate refers to the number of fetal heartbeats per minute, which is 110-160 beats/minute under normal condition. When the fetus is in hypoxia in the uterus, it can lead to intrauterine distress, which can be manifested as abnormal increase of fetal movement and excessive increase of fetal heart rate, which is more than the normal high value in the initial stage, and decrease of fetal movement and excessive slowing of fetal heart rate in late stage of hypoxia, which is less than the normal low value, therefore, the rapidity or slowness of the fetal heart rate can reflect the presence of fetal hypoxia in the uterus or not. Therefore, the speed of fetal heart rate can reflect whether the fetus has hypoxia in the uterus or not. Fetal heart rate has nothing to do with the personality of the fetus. The personality of the fetus after birth is usually related to genetic factors, social environment and family education. After 28 weeks of gestation, pregnant women should count fetal movements and monitor the fetal heart rate during regular checkups. When the fetal movement increases or decreases by 50%, or when the fetal heart rate is too fast or too slow, it is necessary to consult a doctor in time, so as to avoid delays that may lead to an unfavorable outcome of the pregnancy.