The medicalization of childbirth in the twentieth century.
Leavitt
J W
JW
D036861:Delivery, Obstetric / Q000266:history*; D005260:Female; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007743:Labor, Obstetric; D009774:Obstetrics / Q000266:history*; D011247:Pregnancy; D014481:United States