The spine of the baby is usually visible during the 4D ultrasound. If it is not visible, it may be due to the baby’s position in the mother’s belly or the baby may have a deformity, and the pregnant mother can change her position to make the baby change. If you can’t see the spine, you can check again in a few weeks or take the next step, such as an amniocentesis, to determine if the baby has any developmental problems. Pregnant women should pay attention to supplemental nutritional elements and careful nurturing of the fetus in general. When doing 4D ultrasound, they should choose a professional doctor and professional equipment from a regular hospital, and avoid going to private and irregular small clinics, where there may be inaccuracies in the examination results.