A friend of mine who had her 3rd baby in October was seeing a high risk doctor for this pregnancy. The nurse at her practice told her that at the place she used to work, they started noticing a trend of women coming in in preterm labor....a majority of them had just recently eaten DOMINO's PIZZA! They did a little further research into this and "apparently" Domino's uses a certain cheese with a prostoglandin in it that no other major pizza chain uses.
So my friend tested this theory...4 hours later her water broke!!! It doesn't end there, she told another of our pregnant friends who ordered it for dinner one night and her water broke at 5am the next morning.
BUT WAIT, THERE'S MORE, I told my boss' daughter about it, so she ordered it and low and behold, went into labor the next day.
No scientific proof to all of this and probably all just coincidence, I know, but funny nonetheless.
Good luck to you if you try it, couldn't hurt worse than castor oil and you'll probably get the same outcome