The British Journal of Psychiatry reports that researchers in Japan have found older fathers are twice as likely to have autistic children as younger men while the mother's age has no influence on the likelihood of her offspring developing the disorder.
An analysis of 84 kids with high-functioning autism spectrum disorders and 208 children without the disorder found that fathers over 33 years were 1.8 times more likely to have children with autism than fathers under 29 years. Men who fathered children between the age of 29 and 32 years were 30 per cent more likely to have an autistic child, the study found.
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