Anotia and microtia are birth defects of a baby's ear. Anotia happens when the external ear (the part of the ear that can be seen) is missing completely. Microtia happens when the external ear is small and not formed properly.

What is the cause of microtia?

Microtia usually develops during the first trimester of pregnancy, in the early weeks of development. Its cause is mostly unknown but has sometimes been linked to drug or alcohol use during pregnancy, genetic conditions or changes, environmental triggers, and a diet low in carbohydrates and folic acid.

Can you still hear if you have microtia?

Beyond the apparent visual deformity of the ear, children with microtia often experience some hearing loss due to the closure or absence of the external ear canal. This hearing loss can affect how the child's speech will develop.