1. Developmental tasks of pregnancy;Tanner,1969
2. The emotional highs of successful childbirth;Maynard;Woman's Day,1978
3. Prepared childbirth and the concept of control;Willmuth;JOGN Nursing,1975
4. Psychological stress;Janis,1958
5. Childbirth as a crisis: a test of Janis' theory of communication and stress resolution;Levy;J Pers Soc Psychol,1975