In 2013, the ''Washington Times'' said about the causes of autism: "The causes of autism are not understood, and recent studies have found associations between childhood autism and multiple births, preterm births, low birthweights, maternal obesity, having a full sibling with autism and having older parents."<ref>[http://www.washingtontimes.com/news/2013/oct/16/rate-of-autism-rises-in-us-hits-plateau-in-uk/?page=all Autism rates rise in U.S., plateau in U.K.]</ref> | In 2013, the ''Washington Times'' said about the causes of autism: "The causes of autism are not understood, and recent studies have found associations between childhood autism and multiple births, preterm births, low birthweights, maternal obesity, having a full sibling with autism and having older parents."<ref>[http://www.washingtontimes.com/news/2013/oct/16/rate-of-autism-rises-in-us-hits-plateau-in-uk/?page=all Autism rates rise in U.S., plateau in U.K.]</ref> |