I didn't bother with a TENS machine when I had DS1, though all my NCT friends had one I think. I'd had such a terrible pregnancy that I didn't really care about a natural birth, I just wanted it to happen! But actually I had a pretty straightforward labour, about 12 hours altogether (though the hosp said only 5 or 6 hours of active labour, followed by 40 mins of pushing), normal delivery. I had gas and air for the stage from about 5-10cm but not for the pushing bit and that was fine. I didn't have any other pain relief and although I really appreciated the gas and air I felt pretty calm and in control all the way through. Obviously I was lucky and I hope this time will be similar.
I am 35+5 now with DS2 and wondering whether it is worth trying a TENS machine this time? Presumably you can take it into hospital with you? But maybe it's not worth it if it mostly helps you stay at home for longer? I will need to go into hospital fairly early on as I am in a wheelchair with severe SPD and I am more frightened of trying to get down our stairs (2nd floor flat) than of labour itself! And presumably labour is usually quicker with no. 2 anyway so perhaps the stage when a TENS would help just won't be long enough to be be worth it?
Anyone who found it helpful second time round? or thinks they shouldn't have bothered?