That's a distinction without a difference, because in fact men experience the same biological childbearing window: it takes two. Unless we start comparing appl

That's a distinction without a difference, because in fact men experience the same biological childbearing window: it takes two. Unless we start comparing apples to oranges (e.g. women who want to reproduce and abandon the child vs. men who want to reproduce, have custody over, and raise... - or vice versa) the career/family planning difficulties bear substantially equally on both men and women. If career/family planning poses a greater burden on a sex, it's more likely men who lack the capacity to (apologies for the crudeness) "just go get knocked up." A man who wishes to have and raise a kid requires substantially more investment. He has to get a partner and keep them around for at least 9 months or indefinately. Indeed, it's that historical necessity of being able to "provide for a family" which imposed the burden of excessive career development. So, in summary, it's not like women can't have kids in college, or at least, it's not harder for them to do so than it is for men. In this case, women aren't actually shorter than men.