I've heard of it, I haven't seen them being used but my teacher has, and said that they are a great natural alternative and apparently help some women but they don't tend to last long and because they sting quite a bit it's a bit iffy as a trade off ... but anything is worth a try right? This would help out women with back labour and would not take away normal labour pain, so if you don't have a posterior bub then it may not help at all... You can always look up and try optimal fetal positioning and use that in pregnancy and birth, acupuncture also helps with this too - prevention always better than cure?

Fi have you thought about seeing a counsellor who specilises in birth de-briefing? My teacher does it - she's brilliant with it.