The normal value of fetal aortic blood flow velocity is 1.0~1.7 meters/second, and this value can be used to determine the development of the fetal heart. Fetal buds appear first in the process of fetal development, and then the fetal heart appears. The normal range of fetal heart is 120~160 beats/min, which is the initial examination for assessing the development of the fetal heart, and then with the increase of gestational weeks. Ultrasound examination of the fetal heart is also needed to determine the presence of congenital heart disease and other conditions. The normal value of fetal aortic blood flow velocity is 1.0~1.7 meters/second. If the fetal aortic blood flow velocity appears malignant obvious abnormality, we should pay attention to timely to the hospital to seek medical treatment, under the guidance of the doctor to take reasonable methods of intervention, to promote the healthy development of the baby. If the fetus has obvious congenital heart disease, it is necessary to consider termination of pregnancy if necessary.