Autism is a developmental disorder that appears in the first 3
years of life, and affects the brain's normal development of
social and communication skills. Causes of Autism Autism is a
physical condition linked to abnormal biology and chemistry in
the brain. The exact causes of these abnormalities remain
unknown, but this is a very active area of research. There are
probably a combination of factors that lead to autism. Genetic
factors seem to be important. For example, identical twins are
much more likely than fraternal twins or siblings to both have
autism. Similarly, language abnormalities are more common in
relatives of autistic children. Chromosomal abnormalities and
other nervous system (neurological) problems are also more
common in families with autism. A number of other possible
causes have been suspected, but not proven. They involve: -
Digestive tract changes - Mercury poisoning - The body's
inability to properly use vitamins and minerals - Vaccine
sensitivity AUTISM AND VACCINES Many parents are