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[–] viperguy 0 points 0 points (+0|-0) ago 

Maternal ABSOLUTE SITTING INACTIVITY well proven to dramatically increase sill born

They studied AT&T Telephone switchboard operators in the 1940s and correlated to other long duration sitting jobs of various mental stresses.

So an important question become HOW MUCH activity is good before it creates fetal brain damage or other unwanted effects?