Dear EmmaPP
I'm afraid your Natal birthing teacher has misinformed you about HypnoBirthing.
We teach you how to go into self-hypnosis at any point in labour (not a set time). In fact, with practice, you can go in and out of the state whenever you wish.
Like Natal, you are given all the tools and you choose if you want to use them and when you want to use them.
You do not need someone else to bring you into the state of "Self-hypnosis", you do it yourself. With HypnoBirthing we show birthing partners how to help you deepen your state - this allows them to be part of your labour, not an on-looker!
The terms like "surge" are not American, they are used instead of contraction because it describe what is happening in your body in a gentler way. Doesn't "surge" sound better than "contraction"? I don't understand why it should it confuse medical staff - the descriptions are for you & your partner.
Anyway, I highly recommend that you talk to one or two local HypnoBirthing practitioners for more details about the programme, so that you can draw your own conclusions about which course is best for you.
I am not qualified to make comparisons between the courses since I haven't experienced the Natal Hypnotherapy course, but I do know what we teach in HypnoBirthing and don't like to hear that other "birth educators" are making suggestions about it that are clearly not true.
With best wishes
HH