And for the antenatal class instructor, do you ever feel you give women a false sense of control over their birthing experience? Please don't take this the wrong way, I'm sure sometimes some women get the natural active birth they've planned for, but most mums I know did not. Obviously you wouldn't want to scare pregnant ladies - good thing too - but do you ever feel like you're giving them a false idea of what might happen during a hospital birth?
No offence taken! :-)
We're given pretty much a free hand as to how and what we cover in our sessions, as long as we cover what the clients have asked us to in the first session, what ever that may be (including bottle-feeding and how to get a planned c/s on the NHS - I tend to ask people if they want to talk about these things even if nobody actually writes it down on their agenda).
I feel it's my duty to make it crystal clear to my clients what the ACTUAL state of play is regarding their likelihood of having an intervention free birth, so give them stats showing that the majority of women like them will have interventions in their birth. Even if they're healthy, fit and have done all the hypnobirthing classes in the world.
I discuss what, if anything they can do to reduce the likelihood of these things happening, but as most of them don't want a homebirth/to hire a doula/can't access case-loading midwifery care/value easy access to epidural above an intervention free birth (all things which might make a difference) most of this is by the by. Then I spend the rest of the session trying to get everyone into a state of ridiculous explosive excitement about the baby so they look forward to the birth even with a clear understanding that they're unlikely to get through it without medical input. Sometimes significant medical input.
My personal belief is that the classes do jack-shit, EXCEPT maybe explain to people what constitutes good care in labour. I believe very strongly that what women really need is a sense of adventure and a brave, energetic, emotionally engaged and skilled midwife. If a mum has these things then generally all is well. if she doesn't have this then the likelihood is she's going to have a shit old time of it UNLESS her birth is so straightforward that the baby flies out like a greased pig. It's the nature of birth to be vulnerable and completely reliant on your caregivers. So choose them carefully if you can!
It sometimes seems that the more physiologically unhelpful the care the woman has (ie, those mums who are discouraged from moving or changing positions in labour, who are left pushing for hours lying flat on their backs despite a lack of progress), the nicer the midwives and doctors are to them. When I hear stories at reunions which make me want to groan about incompetent care, you can guarantee it'll conclude with a couple of sentences about how farking lovely the staff were. I think 'Yes - if I had suspicions that the care I'd provided might have been partly responsible for landing you unnecessarily on an operating table or shredding your perineum, I think I'd be as nice as pie to you afterwards too. 
.
Do I say owt? No I don't. My policy is to never ask any questions AT ALL about people's births or how they are feeding. If people tell me I smile and nod, smile and nod. I've got used to the myriad stories of breastfeeding disasters and hideous births now.
Sorry to sound so negative, but I'm being brutally honest here. I often sit and look at the beautiful shiny faces of my mums and want to cry when I think about what some of them will go through. So by way of recompense I do try to whizz through the birth bit as fast as possible and focus on the amazingness and the sometimes unspeakable hardness of being a parent.
And I make sure they all know about the glories of mumsnet!