I don't actually think women mind those costs as much. Once you have your first, assuming no complications, many women aren't so spooked by it. I think what re

I don't actually think women mind those costs as much. Once you have your first, assuming no complications, many women aren't so spooked by it. I think what really happens is women with careers, hobbies, etc. have more opportunities for self-actualization that the demands of motherhood, especially of small children, get in the way of. So if women have the education and resources to pursue vocations outside the home, the opportunity costs of spending more months of your life getting sleep in 2 hour chunks are much higher. If, on the other hand, motherhood and the rearing of children is the only sort of legacy they can pursue because the glass ceiling is so low, they'll be willing to put more into it.