Ultrasounds Affect Brain Development?

COMCAST.NET -- Laboratory studies in mice found small but noticable differences in brain development of baby mice that had been subjected to ultrasounds compared to those who hadn't. Scientists note that ultrasound use in humans is further from the baby and that humans have ticker skulls than mice. But they still caution not doing any more ultrasounds than are absolutely necessary.

(I lost count of how many times we saw Rachel in ultrasound and we that 4D thing, too. And probably would do it with a next child as well, if for no other reason than to help Rachel understand what was happening. Well, that and our own impatience.)