Whenever a doctor informs the parents that their child is suffering with Autism, the first & foremost question that is thrown over him is - How did it happen? How did my child get this disease?

Well, there is no definite answer to what are the exact causes of Autism. Yet, there are various theories that the researchers and doctors are working on. Interestingly, it is found that Autism is rather common in boys than girls.

Earlier, it was believed that Autism occurred due to emotional trauma. Hence, bad parenting was added to its causes. The doctors said that mothers not giving their children enough attention & love were a problem. However, these factors were proved wrong with enough study & research.

The most known theory regarding the causes of Autism is - Genetic. Some researchers feel
that individuals are born with the predisposition to be Autistic. Later on some environmental triggers make them Autistic. They say, there are several genes that lead to Autism, but are yet to find them.

Environmental factors are found to make a great impact on Autism. Studies show that there are several cases of Autism in small towns that are exposed to high levels of toxins & chemicals.
Usually, towns located near the industrial areas or factories have quite toxic air that triggers Autism among children.

Another interesting theory regarding Autism links it to mercury. They say, as Autism was first diagnosed near about the same time when vaccines were given, Autism was caused due to the mercury content in the vaccines.

Mercury or thimersal in the vaccines in today's date is almost nil or in mere trance amounts. Also there could be several other risks if these vaccines are not given to the child. So, one finds no reason to blindly blame the vaccines and hence avoid them in order to prevent Autism.