Childbirth without fear, without pain, natural childbirth, educated childbirth, all of these variants have been moving away from take a deep whiff to take a deep breath. Dr. Chabon represents ""psychoprophylaxis""--""intellectual, physical and emotional preparation for childbirth and parenthood""--or more simply the system (conditioned reflexes) Marjorie Karmel introduced in this country in 1959--Thank You, Dr. Lamaze (Lippincott). She also founded the Amer. Soc. for Prophylaxis in Obstetrics of which Dr. Chabon is now the spokesman explaining its technique (exercises), attitudes (including husbands in a supportive role), and a biblical, historical and biological resume of childbirth.