Milhouse Mother Say Milhouse Handsome!

I've been shocked at the incredible bursts of adrenaline and resultant feats of strength I've performed while moving, including lifting a recliner up to shoulder level and carrying it up a narrow flight of stairs. (Note: if you could see me you'd be unlikely to believe this.) Yet, in the wake of my friend's recent nasty bout with childbirth, I find it difficult to imagine women have been doing that since time began. How does this species continue?