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Causes could include:
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No known cause
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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.
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Autism is a brain disorder that affects the way the brain uses or transmits information. Studies have found abnormalities in several parts of the brain that almost certainly occurred during fetal development.
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Some professionals believe that autistic disorders may be caused by allergies to particular fungi, viral infections, and various foods. No controlled studies have supported these beliefs, but some parents and professionals report improvement when ...
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Autism is diagnosed by obtaining a developmental history of the child and observing and evaluating the child's behavior, communication skills, and social interactions. Because the symptoms of autism are so varied, the condition may go undiagnosed ...
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Although autism is behaviorally defined, it is now well recognized to be the endpoint of several organic causes. These include prenatal problems such as rubella(measles) infection, untreated metabolic disorders, and anticonvulsant medication taken...
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No single specific gene for autism has been discovered. Although the exact cause of autism is unknown, it is thought that autism is due to a combination of genetic and environmental causes.
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Although the search has been extensive, as of 2005, no single specific gene for autism has been discovered. Several candidate genes and chromosomal regions have been identified, but much research is needed before the exact roles that these genes p...
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While understanding of autism grew tremendously since it was first described by Leo Kanner in 1943, no known single cause for autism as of 2004 was yet identified, although research has shown that it results from specific abnormalities in brain st...
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