There are genes in general which so far have not been helpful to measure in most situations, except on a research basis. There are starting to be discoveries of several different, missing or duplicated pieces of chromosomes, called copy number variants or CNVs (which may contain 1-40 genes), that are associated with autism, schizophrenia, intellectual disability and epilepsy—that is they are not specific. Research is addressing how great a risk these are for illness, but it is too soon to tell.
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