Autism is a brain developmental disorder that is characterized by impaired verbal & nonverbal communication, social interaction, and repetitive behavior. Usually, parents notice signs in their child during the first two years of life. These signs develop gradually, while some children with autism reach their developmental milestones at a normal speed and then revert. If symptoms appear before age 3 then they are diagnosed with autism. Researches show that autism is 4 to 5 times more common among boys than girls and 1 out of 42 boys & 1 in 189 girls are diagnosed with autism in the US.