I think it's on this list of estrogen foods, i think All of these are true but I haven't looked ALL of them up yet, and also it has some things to stay away from if you want more estrogen ("Inhibiting" estrogen would foods and pills a waste of time/$$$):
http://en.allexperts.com/q/Women-s-Health-3228/herbal-breast-enlargement.htm
/|\^.^/|\ hope that helps
http://en.allexperts.com/q/Women-s-Health-3228/herbal-breast-enlargement.htm
/|\^.^/|\ hope that helps