Simply based on the data of the 4D sheet mostly cannot tell the height of the fetus, because the fetus is mostly in a curled state when the 4D ultrasound examination is performed, and there is usually no way to directly measure the height of the fetus, but there are other growth indicators that can be referred to. In the clinical 4D ultrasound examination, the results include fetal growth indicators, the morphology and structure of each system. Fetal growth indicators mainly include biparietal diameter, abdominal circumference, femur length, fetal orientation, fetal heart rate, amniotic fluid depth, and placental condition. It can help to determine whether the fetus has stunted growth. Ultrasound examination of each system includes the morphology and structure of the fetal cranium, fetal face, fetal spine and limbs, fetal thorax, fetal heart, umbilical cord, etc., which can screen for the presence of malformations. For 4D ultrasound examination, it is recommended to perform the examination within the specified time so that the examination result will not be affected by the fetus being too big or too small.