Harvard Health Columns

Autism spectrum disorders revisited

Several studies raise questions about cause and prevention. The conventional wisdom has always been that autism spectrum disorders (ASD) develops mostly because of genetic rather than environmental factors. Indeed, ASD is usually considered among the most “heritable” psychiatric disorders, with studies in twins suggesting that genetic factors account for at least 90% of the risk of developing an ASD — much more than the genetic risk of depression, anxiety, or other psychiatric…

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