In only had a 'show' with my first pg, and it happened the day before Lindsay arrived. With the girls, I didn't have a show with Erin until after my waters broke and with Paige I had none at all that I noticed. It really does vary - some will have it and some wont' - it's as simple as that, but just because you don't have a show, doens't mean that you wont go early/on time or even late. And if you do have on, it doesn't mean that labour is immenent, it could all happen a week later.