This report was televised by CNN in 1993 after the research findings were reported in the Journal of Nurse Midwifery. Here you will witness first-hand the cellular changes that occurred after one exposure of ultrasound energy and the early warnings of caution about the use of this energy on developing fetal tissue. Those early warnings were unheeded and the safety of ultrasound energy has yet to be conducted in a double-blind controlled trial even though its use is now a standard prenatal practice.

https://www.youtube.com/watch?v=-8szqgtX_GQ


Here are the articles/studies about ultrasound and the risks associated with its use:
http://birthofanewearth..ca/2011/09/dangers-of-doppler-and-ultrasound-in.html
http://www.wddty.com/ultrasound-the-scan-scam.html
http://birthofanewearth..ca/2012/09/the-dangers-of-prenatal-ultrasound.html
http://sarahbuckley.com/ultrasound-scans-cause-for-concern

http://www.greenhealthwatch.com/newsstories/newslatest/latest0701/ultrasound-hurt.html