This thread's so long and I just looked at it for the first time this morning so sorry I haven't read it all, just scanned (how appropriate!).
First, going back quite a bit I don't want people to read Welcome to Holland and think that's what its like to have a child with a disability, I think its trite and let's everyone off the hook by thinking its just different, not worse, OK not for everyone but for myself and most of my friends, by and large its worse. There's another called Welcome to Beirut, much more appropriate, you can imagine. Can't find it, I'll have a look if anyone's interested.
Second, I've got a 1 year old baby. I already have a son with severe autism and a MUCH higher risk of autism with another son, not just because of general statistics but because of family history. My Prof agreed that if I wanted to find out the sex and it was a boy I could decide not to have it and acceptable (psychological) grounds would be agreed. We seriously thought about doing this, there is no test for autism and if there were I would have had it and not had a baby if it too were affected. However, we decided not to find out and take our chances and love our child whatever happened. You can imagine the tension in the delivery room (c-section), there was a lovely nurse there who told us she had a 19 year old son with autism and she kindly squeezed my hand and said she knew what it meant. Well, out popped a girl, we were flabbergasted and, of course, happy. We would have been very happy with a boy but much, much less anxious and with clear and genuine less reasons for that anxiety. Having a SISTER with aspergers, a girl is no guarantee and there's still a higher risk of autism anyway if you already have a child with autism. So far she seems fine but who knows what subtle problems may be lurking so I do find it a little upsetting when people assume everything's OK, its a long time before we'll know for usre but she is definitely not like our son.
Third (god, this is getting long!), I'm one of 3 girls. My dad wanted boys but wasn't devestated, he just treated us like boys a lot. We didn't have dolls but cowboy outfits, lots of physical play like skates and bikes etc. We still all grew up to be feminine but we swear like troopers and like football. Ooooer, gender stereotyping, but we were quite unusual in those days.