I had my son on monday and used a TENS machine it was fantastic! I thought at one stage i didn't need it anymore but a few minutes later it was back on again as i didnt realise how much pain it took away! I would definately recommend it!! I didn't turn it up or down i just had it set at a constant level, just turning it up as labour progressed. All in all i used it for close to 8hrs of the 10hr labour. Good luck!!