Despite the ubiquity of harmful math attitudes that disadvantage girls, girls are now performing just as well as boys in math in the U.S. (Hyde et al. 1990; Hyde et al. 2008). At the same time, stark gender disparities remain in who chooses to pursue math-related careers (National Science Foundation 2009). Why have gender disparities persisted in some math-related domains but not others? I suggest that considering the extent to which math-related domains are stereotyped as masculine can help explain why women do not seek out math-related careers, even as they perform just as well in math. Changing current stereotypes of math-related careers to make them less incongruent with the female gender role may help to recruit more women into these careers.