"For high-achieving women, it might as well still be the Eisenhower era, which was the last time the nation as a whole had such a low rate of unmarried births. Because of high-achieving women's greater behavioral conservatism, it is marriage -- not degree of professional success -- that is the single largest determinant of whether they will have children."
[full piece at] http://www.prospect.org/print/V13/12/franke-ruta-g.html