I'm heard and read a lot about it. From what I heard It's something to stay away from because it can put you into labor even if you and the baby aren't ready. That is one thing I will not try as everyone I've talked to advised against it. I've heard evening premise oil can be effective but take up to 2 weeks if you insert some into your cervix every night. If your far enough along and 2cm diolated I'd suggest asking if your dr will do a membrane sweep.
I researched a lot about black cohosh and I took it for a little over a week before I stopped, only because it wasn't Dr. prescribed and I just got worried it might complicate my crappy situation more. It is all natural and is suppose to cause the body to produce more estrogen naturally which in turn would lower testosterone. A lot of people use it to induce labor but if you google it you'll find all the pros and cons. I would ask your dr. first, or a health specialist to see if it can hurt.....if they say it can't hurt....then it's worth a try.