This is interesting. Science professor runs the numbers on the female and male science/engineering/math faculty in her department, and finds that most of the women are married, but roughly half of them are married to male professors in the same university. Of those, most are married to a male professor of science/engineering/math. By contrast, most male faculty aren’t married to another professor at all. Her conclusions:
It is a myth that women have to stay single (and childless) to succeed as professors at a research university.
Women professors are commonly married to men who are professors, but the reverse is not nearly as common. This is not news, but I think these data highlight the well known fact that it is important for universities to deal with the infamous 2-Body Problem if they want to hire and retain women faculty. Dealing with the problem requires committing resources and being prepared to create positions within the same department or within different departments. This has to be handled at a high administrative level and not left up to departments.