2D ultrasounds are the traditional flat, black-and-white fetal images. It uses high-frequency sound waves and special imaging software to create images of your baby, which are displayed on a monitor. The purpose of a 2D ultrasound is to look at the baby's bones, organs, and limbs so that the baby's development can be tracked.

3D ultrasounds also use sound waves to create a sharper, more lifelike image of your baby by focusing on skin and anatomy. 3D is especially popular because, unlike the black and white image of a 2D ultrasound picture, a 3D can give you a clear idea of facial features, body shape, and contours.

4D ultrasounds are similar to 3D in that they focus on exterior development like skin and facial features and may be able to detect fingers and toes. 3D is a static or still image, whereas 4D is a moving image where you may see your baby smile, move, suck it’s thumb and even swallow.

5D ultrasound is a software package that enhances bubbas facial features and has a virtual lighting source however, it is pretty much the same as 3D ultrasound.