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There are a lot of different speculations about why people get autism. Some researchers have theorized that autism is caused by heavy metal buildup in the body, but other evidence has shown that theory to be somewhat shaky and possibly untrue. Other evidence suggests that autism is primarily a genetic disorder. This theory seems to be gaining popularity, and so far no studies have been able to disprove this theory. In fact, there have been several reported cases of parents being diagnosed with asperger's syndrome (a more mild form of autism) after their children have received the same diagnoses.

Well said above and additionally, there is an environmental factor that triggers the genetic predisposition that basically kicks the autism into gear. What the trigger is remains unknown and has been speculated it varies from individual to individual.

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14y ago

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