I took Gentle Birth Formula from Mountain Meadow Herbs (I think?) with my 2nd pregnancy. Both of mine were natural births, and the 2nd was definitely faster, but it's hard to say if the Gentle Birth stuff helped or it was just a typical faster 2nd birth, you know? I certainly didn't have any adverse effects from it and I would use it again.
Re: Anyone taking 5W or gentle birth?
5W...hmmm that sounds a lot like L6W which my MW's suggested... If they are similar, my MW sells it at their practice...otherwise IDK sorry