Not all pregnancy bellies are the same shape. Some people say theirs looks more B shaped rather than D shaped, with a dip in the middle rather than one smooth round. This isn’t a medically recognized thing, and as there isn’t one standard bump type, it’s fine if yours isn’t D shaped. With a baby moving around, you might notice bump changes throughout pregnancy.“How the baby’s positioned in the uterus can cause the bump to look like different shapes, and the baby is constantly moving,” Dr. Celestine explains.