This article doesn't specifically mention pregnancy and birth, but the concepts could be easily applied. I thought you might be interested esp. this line: "You can't be a victim of medical error if you are not in the system"!
http://www.nytimes.com/2007/01/02/health/02essa.html?ex=1168578000&en=7c2783 399f526e72&ei=5070&emc=eta1 -- This mailing list is sponsored by ACE Graphics. Visit <http://www.acegraphics.com.au> to subscribe or unsubscribe.