URMySunshine77:You should look into Castor oil if you want to jumpstart labor. I don't have personal experience, but it's in my arsenal of tools if I go over my EDD.
You should never, ever take that without discussing with your doctor for proper dosing.
And if you have any desire to not poop during delivery, definitely avoid this route. Basically you'll spend your whole labor with what resembles the stomach flu. Rawr.