Childbirth - yesterday & today.
D005260:Female; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007231:Infant, Newborn; D007743:Labor, Obstetric; D008880:Midwifery / Q000266:history; D009774:Obstetrics / Q000266:history*; D011247:Pregnancy; D014481:United States