Birth ball is great couldn't be without mine
I went and got a ball about month and half ago. I do 45 minutes peaceful move type exercises for my back and hips really helps with stretching Pains. Doesn't put me in labor I'm 38 weeks but i get great relief and mostly likely use it while in labor if its not a quick trip off to the hospital
I uwe'd mine for the last few weeks before going into labor, I ended up having him 4 days before due date. I'm not sure of it helped bring labor on or not, and I didn't use it once in labor. I feel like it's a wonderful thing to do instead of lounging on the couch or in a computer chair. Puts your pelvis in the right spot so baby can engage your cervix, and let's baby get in a great position, helping to keep baby out of breech.