I had nothing to prewarn me... well at least nothing that I'm aware of! First one was c/s - breech - so was before EDD. Second... thought I needed to pee, after getting in and out of bed about 5 times I asked DH if he wanted to get up with me cos I couldn't sleep. Turns out I was in labour...lol. I had NO clue and had no waters break (they did that at hossy) and no plug lost before. So, for me... it was straight into it! Good thing I reckon, no time to contemplate too much...lol.