Spa tub labor

Katie
Does anyone know anything about spa tub labor? My doctors office offers this but with my first two I had an epidural. This is my last one and I was thinking trying something new since I'm finally having a non high risk baby that might not be preterm like the other. So my question is how does it work? Does it hurt? Are you offered any type of pain relief? Is the labor quick? Anything you know would be helpful for me to try and pick if this might be right for me. Thank you