title: Natural childbirth: its origins, aims and implications.
mesh_terms: D000223:Adaptation, Psychological; D005260:Female; D005313:Fetal Death; D049673:History, 20th Century; D006801:Humans; D007743:Labor, Obstetric; D008428:Maternal Mortality; D008429:Maternal Welfare; D008603:Mental Health; D008722:Methods; D009321:Natural Childbirth / Q000266:history*; D011247:Pregnancy