I don't know what you mean by "competitive," but I was in labor for 36 hours with my first. I woke up in labor. The first 12 hours were very uncomfortable and pretty regular, but not yet painful. I'd had noticeable Braxton-Hicks all through pregnancy (this is actually normal; it's just that for some weird reason, most women don't feel them until later on), so I knew the difference. The next 10 were mind-numbing horrible agony, and the next 12 were blissfully drugged. So I guess you might say I was in labor for 22 hours, if you're talking about when it starts to be horrible.