What causes Autism is something every doctor hears when they tell a parent their child is Autistic. There is not one definite answer to this question. There are several thoughts on what causes Autism. Some of the causes of Autism are thought to be genetic. Doctors think there are several genes that cause Autism, but have yet to locate them. They now feel that some people are born with the predisposition to be Autistic. Then they have some type of environmental trigger and they become Autistic. Click here to read more