I think we can all agree that when you have a baby, your body changes. Physically, hormonally, chemically, all that stuff DOES things. I for one am happy I don't have to think of ANY of that happening to me (especially the hormonally, since I'm pretty sure things would go...Badly). For a mother-to-be to not take any of that into account would be silly (and I'd be worried about what kind of doctor they're seeing that wouldn't warn them about that).