I'm 36 and although I can't 100% prove it without asking (and I try NOT to talk to my mother- if that's what you want to call her), I'm 99.999999~% sure that she smoked during her pregnancies. I've always known her to smoke like a chimney (even when she's folding the clean laundry), so it totally wouldn't surprise me if she smoked when I was in utero.