Having a baby with my Asperger Boyfriend - Heredity

Hi to all of you !

I am in a relationship with my boyfriend since a couple years now, he is Asperger and we are now thinking about starting a family :)

I am looking for information on statistics and chances that our child develop autism too.
According to what I read on the internet the hereditary factor is quite important, although I cannot find precise statistics. Anyone have any clues?

Thank you!