The jury is out: There are a lot of thoughts about what causes autism. None has been conclusive or explained a large majority of cases yet.
Answered 12/5/2017
3.9k views
At least 376 differ-: ent microdeletions & microduplications or Copy Number Variants in small sequences of genes on various chromosomes are known autism susceptibility genetic abnormalities. Chromosomal Microarray finds CNV's in 10-15% of people with Autistic Spectrum Disorder &/or Intellectual Disability. A DNA Probe for Fragile X Syndrome, a known cause of ID & ASD, still has to be done.
Answered 7/28/2014
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