The inability to see fetal images in the macrosomia is related to fetal position, short gestation cycle, fetal malformation and other factors. 1. Fetal position: If the fetal position is obscured during the screening mammography, it is impossible to see the face, lower limbs or other parts of the body, and it is also impossible to observe the internal organs of the fetus, so the fetal image cannot be seen. 2. Short gestation cycle: If the current gestation cycle is relatively short and the major screening is not done within the specified time, the limbs, face and internal organs of the fetus may not be observed and the whole image cannot be seen. 3. Fetal malformation: If the fetus is physically malformed, it may show an incomplete form and the whole image cannot be seen through the screening mammography. If you can’t see the image of the fetus in the screening test, it is recommended that you go back to the hospital after a period of time, and if you find any problems, you need to deal with them in a timely manner.