#1 started with a 'stitch' every 15mins or so. That was about 12hrs before I actually thought it could be labour when they had a definate 'period' type pain.
#3 was just like BH until about an 1 1/2 hours before he was born. It went on all day. My besty and I argued all day whether it was or not because I could talk through them. Turns out I was in labour lol