Amen Ame! I can't prove they are harmless, no moreso than they are harmful, but seeing as everyone I've never known (including my mother onwards) has had at least one (sometimes 2 or 3) and every child has turned out completely fine will no ill effects, that tells me it can't possibily be so horrible! Innocent until proven guilty!
Plus, to each their own, you don't have to do something because someone else prefers not to. Everyone has their own opinion and I hate trying to argue with those who "have to be right". As far as I know, no children have been born with three heads yet because of u/s. And the only thing thats been "proven" is the fact that left-handedness is more common in those that have u/s. Well big deal, they'd prolly be left-handed regardless!
Bah! We have enough to worry about and I for one, am not going to go insane worrying about something that most likely (like 99.9%) won't have any ill-effects. Just not important enough to cause myself stress over. I have pictures and the comfort in my mind that my baby is fine. (I've only had 2 so far and don't expect anymore until near my due date to make sure lil one isn't breech as earlier - blech - is a c-section the only way to go with a breech BTW?).
Oh but one thought I had to throw in for Canadian's. All my medical is covered here. And so are the u/s. So the doctor doesn't in fact get paid at all for use of it, he gets paid for my visit, and my visit only. He doesn't even use the machine, a lab technician does. So I know he isn't doing it for any financial benefit at all. And we get the regular "routine" u/s here. One at 18 weeks, and one near 36-37 weeks (you may have a third such as myself (a trans-vaginal) due to trying to figure out my elusive due date!).
I'm not pushing my views on anyone, I give my two cents. Basically, do what makes you feel more at ease. If you want them, have them, if you don't, then don't. Not much point in arguing the topic anyhow when there are so many different views on it, and views are neither right nor wrong, they are just views.
Thats my view and I hope no one takes offense!