I listened to the audio CD several times - it had a lot of breathing exercises. Each time I became dizzy and started to hyperventilate! I brought the CD into my midwife and she said to stop listening to it right away. She said that when the body is completely relaxed, it knows exactly how to breathe. My midwife said, "The techniques used in this CD are from the 60's and we don't do that kind of breathing anymore during pregnancy or labor." She also said, "This author knows nothing about pregnancy or labor - she's just a hypnotist." She recommended that I use another method and I did - it was WONDERFUL!