Obstetrical overview.
D002585:Cesarean Section / Q000706:statistics & numerical data; D005260:Female; D049670:History, 17th Century; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007743:Labor, Obstetric; D009774:Obstetrics / Q000266:history; D011247:Pregnancy; D011787:Quality of Health Care; D014481:United States