Washington: Men who have children when they are older have a greater chance of having grandchildren with autism compared to younger grandfathers, a new research has revealed.This is the first time that research has shown that risk factors for autism may accumulate over generations.The study was led by King`s College London`s Institute of Psychiatry, Karolinska Institutet in Sweden and the Queensland Brain Institute in Australia.By using Swedish national registers, researchers identified 5,936 individuals with autism and 30,923 healthy controls born in Sweden since 1932. They had complete data on each individual`s maternal and paternal grandfathers` age of reproduction and details of any psychiatric diagnosis.
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