just to counter the 'it's all well and good if nothing goes wrong' arguement...
with dd the cord was around her shoulder and her heart rate plummeted, doctors were rushing in and i was told to push before having the urge to do so to save her life. because i could feel everything and my mind was clear i got her out in less than 10 mins from first pushing and her life was saved, any longer might have cost her dearly. i had tiny cuts on my labia, nothing worse.
with ds1 he was back to front, i pushed him out still facing the wrong way with only 3 pushes as i could feel everything and could work with my body. again, only labial grazes.
both those labours were 18 hours long so i was exhausted and by no means had an 'easy' time of it, i'm convinced if i'd had pain relief both those outcomes could have been drastically differant, dd a crash cs and ds1 forceps most likely.
with all three births i went from 5cm to baby out within half an hour as i could feel what my body was doing and work with it.
i think epidurals have a place in cetain circumstances, as do all medical interventions, but they are massively overused as women have been told labour is so painful and terrifying and all control is lost that they are petrified of having to go through it with nothing. however if a woman is taught how to cope with pain then she can make a much better choice during labour about her own personal requirement for pain relief, rather than like so many women i know who decided before they ever got pregnant that they'd need every painkiller going to endure it.
as an aside... birth is not a 'medical procedure', it is a natural process.. granted a painful, messy process but then so are many things in life... it has been turned into a 'procedure' by years of medical over intervention at the cost of the physical and mental wellbeing of mothers and babies.