hoobley you bring up some fabulous points which i have also been reading about lots lately.
it's amazing in regard to vaginal births, i've watched a couple of birthing videos of women who remained laying down to give birth, lots of women commented that this was the second worst position to give birth in (besides upside down, ha ha) and yet thats what you see or imagine when you hear of birthing and only since i have been reading about labor and birth have i found out about all these other options available and positions which are apparently more helpful for the mum and baby.
puppies just to let you know my SIL is a very small frame and she gave birth naturally to her dd with no problems.
also i have decided (personal opinion) i am not dissing my chiro's advice but i am def exploring all my options and reading so much about both issues, and i have become quite knowledgable. ha ha, poor DH will probably think he could deliver this baby with all the information i've told to him.