"And wasn't there some concern a few years ago about frequent ultra-sounds causing hearing problems in babies developing in utero?"
I'm no doctor, but frequent ultrasounds can't be good for the baby.
Ultrasounds are fabulous, magical, wonderful. There is a movement among pro-lifers to establish a few of these machines across the country to offer free "baby pictures" in the hope that an informed choice might prevent some abortions.
I don't know if one every day is a good thing--but please don't talk down ultrasounds because of one nut.