An anonymous reader quotes a report from ScienceDaily:"This new finding supports the idea that increased prenatal sex steroid hormones are one of the potential causes for the condition," said Professor Simon Baron-Cohen, Director of the Autism Research Center at the University of Cambridge and author of the study. "Genetics is well established as another, and these hormones likely interact with genetic factors to affect the developing fetal brain."The team cautioned that these findings cannot and should not be used to screen for autism.