Only had the one child, Angelgirl, and she's a Kanner's autistic. One data point isn't nearly enough to reach a conclusion; however, since evidence strongly suggests a genetic component to autism (current suspects are on chromosomes 2, 11, and 16), it would be reasonable to conclude that an aspie has a higher-than-average chance of having a child on the spectrum.
I've found, though, that it's been a blessing for my daughter - since I'm on the spectrum but able to speak, I get to intervene with the NTs on her behalf, explaining things like sensory overstimulation and the role of stimming in mental stability. 
_________________
Sodium is a metal that reacts explosively when exposed to water. Chlorine is a gas that'll kill you dead in moments. Together they make my fries taste good.