No one knows the long-term effects of ultrasound use. Many practitioners feel that the technology is perfectly safe since studies of babies and their mothers have not determined any effects. Other practitioners are not so convinced of ultrasound safety and feel that judicious use is advised.
It should be remembered that x-rays were in use for 50 years before the public became aware of detrimental effects. DES and thalidomide alsso were deemed safe and were later found to b…