I feel the same way as LS, pregnancy was always always always the first thing I was taught to worry bout when feeling off (once I was sexually active, obviously!). For my experiences of pregnancy, it seems unimaginable that someone could not know. I used to be quite cynical about the whole topic actually. BUT, now I see it this way; these women, their bodies obviously handle pregnancy very, very well. Better than most. No huge bloated belly, aches or pains, braxton hicks, prelabour, SPD etc. Just a bit more tired and a bit of weight gain! I'd imagine it would be a huge shock, and while I can hardly comprehend not knowing I was pregnant and going until term, I'm no longer cynical of people who have.