my 19yr old son definitely wants children some day, but is very concerned about passing on his faulty genetics -- not his ASD ways of thinking (he actually likes that part about himself, as many on here have often said)...but rather, his poor balance, coordination and spatial issues (which prevented him from being able to competently play sports), and his co-existing conditions of OCD and SAD, which are extremely debilitating at times.
all three of those conditions run rampant on my (NT) mother's side of the family -- affecting two out of four of her children (including myself), five out of eight of her grandchildren (including one each from my NT siblings), her father, two out of three of her siblings, two out of four of her siblings' children, and roughly half of her cousins from three generations. so, it's got to be genetic in our case. 