Didn't look at the video, but did look at "Epidemiology of human
exposure to ultrasound: A critical review" and "Quantification of risk
from fetal exposure to diagnostic ultrasound" for a start, and they
were interesting.

http://www.sciencedirect.com/science/article/pii/0301562988901743
http://www.sciencedirect.com/science/article/pii/S0079610706000988

Speculation: operator of equipment is critical to safety.

Disclaimer: no kids, no plans to procreate, but am quite aware of
people brandishing their progeny at me.  ;-)

--=20
James Cameron
http://quozl.linux.org.au/
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