The theory and practice of natural childbirth.
D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D009321:Natural Childbirth; D011247:Pregnancy; D014937:Work
LABOR
Psychosom Med. 1952 Nov-Dec;14(6):431-8
13014219
Am J Public Health Nations Health. 1950 Jul;40(7):787-91
15425658