4D scans show moving 3D images of your baby, with time being the fourth dimension. With 4D scans, you see your baby’s skin rather than her insides. You may see the shape of your baby’s mouth and nose, or be able to spot her yawning or sticking her tongue out.
4D scans considered safe because the images are made up of sections of two-dimensional images converted into a picture. So, 4D scans may provide more information about a known abnormality. Because these scans can show more detail from different angles, they can help in the diagnosis of cleft lip. This can help doctors to plan treatment to repair a baby’s cleft lip after birth.
4D scanning can also be useful to look at the heart and other internal organs. As a result, some fetal medicine units do use 3D scans, but only when they’re medically necessary.