Disadvantages for 3-D ultrasounds

Is it safe to take a peek inside your tummy on the way to Sears? While the FDA has yet to establish rules on these prenatal photography studios, they do warn against having ultrasounds for fun (as opposed to for medical reasons), since such three-dimensional imaging machines use much higher power than the typical ultrasound machines at your doctor's office. And many medical professionals fear that nervous moms-to-be will come away wrongly convinced there's something wrong with their babies, or, worse, that the untrained wand wavers will miss real problems that would be detected by a pro.