www.wiset.org.uk/index.php?mact=News,cntnt01,detail,0&cntnt01articleid=654&cntnt01returnid=24
survey linked on this page to try and ascertain how many women in STEM jobs are no longer working, if that makes sense!
I can't link to the actual survey for some reason, but have filled it in. It will be interesting to see how many women leave science when they have children (as I did)!