The problem is childcare which lasts much longer than 2 weeks. A woman who wants to focus on career and have children would be best served marrying a guy with less career aspirations than her which she would be less likely to run into in corporate circles.
I'm not sure this assertion holds any water for one. But I don't see how this could be framed a gender specific issue for another I suppose. Either way make sure your partner understands your ambitions when you get together?
There are probably selection factors at play too in that there are simply less men available who want to be househusbands than there are women who want to be housewives.
Successful men are probably also sexually more attractive to women than vice versa, an aspiring househusband with a low paid job would probably find it harder to get a date with a female CEO than the other way around.