Likelihood of more Extreme Autism being passed on from an Asperger's Parent?

Hi all, so my husband has just had a diagnosis of Autism Spectrum Condition and that he "displays many features consistent with an Asperger’s type presentation (although this is no longer recognised as a formal diagnostic term)". We have not had the full report yet but his symptoms are fairly 'mild'. We have a son who is 3 who may be showing some signs of Asperger's although its very hard to tell). But we are currently going through IVF for a second child and have an embryo transfer in 2 weeks. We were just wondering if anyone knows if there is more of a chance we can have a child with a more extreme form of ASC than my husbands (more chance than a person without an Autism Spectrum Condition)? Although we are used to some of the challenges my husband faces and we have no concern in our ability to cope with those, we feel we would not be able to cope with anything more.