I think the cleanest experiments here would be those having to do with stereotype threat. For example, women asked to write down their gender (even just with a checkbox) before a math test at the GRE level score significantly worse. Asian women asked to also write down their race are inoculated against this effect. These women are "primed" with their stereotypes and it dramatically influences performance. Even asking people to think about being a professor increases their performance!
I don't know if there are any related experiments with priming subjects with the concepts of "mother" or "feminine" or what-have-you, but it's a good place to start.
Maybe priming women with a reading comprehension test involving a passage with Marie Curie? Or Lynn Margulis? Or Sophie Germaine...
Also, this is indirect, but the study of highly talented women and men here: http://www.vanderbilt.edu/Peabody/SMPY/Ferriman2009.pdf
...shows a strong pull toward shorter hours/working from home for women over men, and it gets stronger as women age from 25 to 35.
I think this indicates some of the pressures of motherhood.
To this end, I think it might be a good idea to have mixed age Montessori schools at places of business. Since it's an exploratory learning model, and the place is set up to be a cool place to learn and play and be anyway, and one of the biggest recruiting draws and factors in the choice of workplace is often the school district, and a single teacher can handle the mixed-age children of a small-mid sized company because they largely teach themselves/each other, and because that's less expensive than private school and the parents could participate more in their kids lives if they were physically close to work, I think it could be a huge benefit to forward thinking companies. Don't know, but it could help both men and women.
Bonus:
Check out the graph on page 477 here:
http://www.vanderbilt.edu/Peabody/SMPY/SexDiffs.pdf
It plots surveyed personal importance for various issues, like "Developing my intellectual interests" to "Part time career for a limited time". You'll notice that the male and female responses almost entirely match, with the few exceptions, and there it doesn't deviate by much!