No it's not 100%. and it's common for it to cause a bit more then just spotting. I had to wear a pad for a couple days after cause I bled. With my last pregnancy I had them stripped on a friday and went into labor on a monday at 3 am. I have to keep in mind though that it was my 3rd pregnancy and my first two were delivered between 37 and 38 weeks, I was exactly 39 weeks when I delievered my 3rd baby. It may have been that I had my membranes stripped that put me into labor, or it may have been that my body/baby decided it was time. There's really no telling.
at 11:52 AM on Jul. 10, 2008