We are a species where, thus far, the burdens of
motherhood are associated with a single gender
I agree with you here. I don't know why the HN crowd is refusing to see this point... an infant in its early months really needs the mother.But I disagree on the point that the role of motherhood inextricably falls down on a woman's turf for the years to come. As a male I can say that I would be happy to be a stay-at-home-dad after the infant is of a certain age -- and I have met many women who're okay with this idea (of the man staying at home while the woman makes money).