Testosterone leading to more autism?

Foetal testosterone linked to autistic traits:

This latest update on their progress, presented by Simon Baron-Cohen and Bonnie Auyeung at the British Association's Festival of Science in York today, shows that the correlation between foetal hormone levels and autistic-trait behaviour continues as the children grow up. ...Baby boys produce more testosterone in the womb, which means they can also expose a non-identical female twin to higher levels of the hormone. But other genetic and environmental factors are thought to also play a role.

This is of course part of Simon Baron-Cohen's research program on empathizers and systemizers....