I've never heard of any harm coming from ultrasounds. I had 2 done while I was pregnant. I think if there were any risk involved, doctors wouldn't do them. The place I went to was not associated with a dr. but required I have written permission from my ob/gyn before the sessions. It's really neat to see your little baby's features. All I could do was cry when I looked at mine. Everything was so defined and we watched her sticking her tongue out alot and smiling when she did it. It was unbelievable!!