This article, by the Founder and VP of Hypnobabies addresses the question "Why shouldn't women using Hypnobabies Childbirth Hypnosis attend any other childbirth classes?"
https://www.facebook.com/notes/hypnobabies-official/hypnobabies-moms-embracing-one-belief-system-for-a-more-joyful-birth-by-kerry-tu/497321360283852
https://www.facebook.com/notes/hypnobabies-official/hypnobabies-moms-embracing-one-belief-system-for-a-more-joyful-birth-by-kerry-tu/497321360283852