Did the Duchess of Cambridge use hypnosis for birth?

Well there has been a lot written about the Duchess of Cambridge using hypnosis techniques for the birth of her son. Interestingly, these were written before the birth and nothing yet has emerged afterwards, if it ever will. I hope she did take the time to learn the techniques on The Birth CD programme, all of then can help to contribute to a positive and calm experience for the mother, a calm baby and also to aiding recovery afterwards. Certainly the duchess looked marvellous the day afterwards when she showed off her new son to the world.