Like regular ultrasounds, 3D and 4D ultrasounds use sound waves to create an image of your baby in your womb. What's different is that 3D ultrasounds create a three-dimensional image of your baby, while 4D ultrasounds create a live video effect, like a movie - you can watch your baby smile or yawn.
3D and 4D scans are considered as safe as 2D scans, because the images are made up of sections of two-dimensional images converted into a picture. However, experts do not recommend having 3D or 4D scans purely for a souvenir photo or recording, because it means that you are exposing your baby to more ultrasound than is medically necessary. 3D and 4D scans may nonetheless provide more information about a known abnormality. Because these scans can show more detail from different angles, such as diagnosis of cleft lip, heart and other internal organs. This can help doctors to plan the repair after birth.
Preparation: In general, there’s no preparation required for this test. You should wear a loose-fitting, two-piece outfit for the examination.
