The chances of missing the identification of Autism are estimated to be more in case of girls because they show different symptoms.
There are still studies going on to find the apt reason for the cause of autism. It was proved that Autism is mostly a genetic defect. The recent studies say that protein mutations may have something to do with this brain-related disorder. Another theory proposes that things like increase in rainfall may be the key behind development of autism.
People with autism suffer from incapability of developing friendship or relations with the society.