Handle and Sabire
You both have good points and I think the actual truth is somewhere in the middle of what you are both saying.
Epidurals definately result in an increase in instrumental births. But there is a big difference between having an epi at 2 cms and having it running for 12 hours and having one at 8cm and having it running for a couple of hours.
I really doubt there is a big difference to the instrumental rate in having a late epi - it just gives pain relief in transition and helps with pain relief in pushing. However if someone has hours and hours of epi, and cant feel a thing, they are much more likely to have instrumental birth, and also very much more likely to need synto to restart or speed up labour.
This is true mostly of primips, I really dont believe it makes a huge difference in multips, although it will slow labour significantly and result in an increased use of synto.
But Handles point of some women needing intervention at the end irrespective of having an epi is also very true, and women who have a baby in an OP or asynclitic position are likely to want to have an epi due to higher levels of pain, but they are still at high risk of an instrumental birth anyway! Likewise, when I do a VE and find that someone has a prominent pubic arch or slightly small pelvic outlet, where I think she is not going to push the baby out herself, I would encourage an epi, knowing that this woman will probaby have an instrumental birth anyway, however active they are.
Also there is a big difference in the mindset and the outlook of women who choose a homebirth and the general hospital population having babies. In the unit I work in, most women dont really care about being active and the kind of things we talk about on mn, such as this. They want you to get the baby out for them and do it as quickly and painlessly as possible. Maybe as little as 20% have any real preferences or desire for a natural childbirth experience - which is sad really. Its a rare Indian, African or Eastern European woman who will get off the bed in labour without major coaxing
Maybe thats just in my hospital!
As to the Australian study - I am very surprised at that as I have until recently worked in Queensland for many years and the c/s rate overall in my unit (admittedly a big tertiary unit) was over 40%, thats for inductions, spontaneous etc. For any primips to achieve c/s rates of 1.7% rising to 31% just because they had an epi, I would have to be very sceptical about - in fact I just dont believe either figure actually - these figures must have been spun somehow. Logically they just dont add up.
Im not disputing your quoting of the study, but I am very disbelievingsceptical of the results. Do you have a reference or link for that study please Sabire? I may have to eat my words again!
Sorry this has turned into an essay again ladies!