Quoting www.nytimes.com/2012/04/05/health/research/scientists-link-rare-gene-mutations-to-heightened-risk-of-autism.html
Teams of scientists working independently have for the first time identified several gene mutations that they agree sharply increase the chances that a child will develop autism.
They have found further evidence that the risk increases with the age of the parents, particularly in fathers over age 35.
They have found further evidence that the risk increases with the age of the parents, particularly in fathers over age 35.