Go to the grocery store and buy pineapple but not pre-sliced. It has to be a whole fresh pineapple. Then cut it up and eat it. Eat as much as you can. That's what made me go into labor I think at 12:30 a.m. the day after my daughter was due. My nurse had told me to do it because it has some chemicals in it that helps labor. Google it. It's actually a thing.