Interesting....
I bought the natal hypnotherapy book because it's my first birth and I'd like to get some breathing techniques under my belt. Like pps have said, I'm aware that birth is often not something you can control, but if it does turn out I can have a crack at it without a section, id like to.
Reading the book as a scientist, I have to say, caused a LOT of eye rolling. Her use of statistics is very misleading (x% of women using hypnobirthing had a c section, see how low that is! Uuuh, yeah, of course it is, you're self selecting a sample of women who a. Want to have a natural birth. B. Are probably not keen on having a section and c. Haven't been told they need a section due to factors outside their control...)
The section on homeopathy got major eye rolling. Seriously, that should NOT be in there. Null points (diluted and shaken a bit...)
Some of the birth stories were very cringey " I woke up at dawn, made a latte and dabbed some clary sage oil on my dressing gown.."
There's still a fair bit of noble savage shit. Yes, women have indeed been birthing in fields/baobab trees for millennia. I bet they were still terrified and the maternal mortality rate was hideous pre modern medicine. If you read any historical source you can see the dread of childbirth - it was always a big deal, and always dangerous. I doubt there's ever been time we just squatted and painlessly popped out an infant. Tribal populations now who still live in pre- modernity conditions do not have effortless births - there's a passage in the wonderful "cherubs, chattels and changelings" a book of child rearing globally, that describes a Yanomamo women dying agonisingly in birth with no one helping her, and everyone just basically shrugging and saying "well, that's life". So to think it was some sort of garden of Eden before modern medicine is deeply naive.
But, I still think the basic premise is sound. Learn to work with your body, control fear and pain and use visualisation and breathing techniques to do that.
I wish the basic premise hadn't been coated in a layer of poor science and noble savage myths. It doesn't need that and for me, it spoiled it. Also rather hard to get your also- scientist husband on board when he's going into full pedant mode reading it....