Primrose oil

I'm a FTM and I want to try to avoid inducing labor if possible. I am 35 weeks 4 days today and my next appointment with my OB is next Friday. (I'll be 36 weeks 3 days) I've heard some women use primrose oil to help start labor. Just wanting to get other women's thoughts on this. Did it work for you or not? When did you start using it? I will of course speak to my Dr. about using it just to be safe but I'm interested to hear from mom's who have used it and if it did or didn't work.