Bloodletting in American obstetric practice, 1800-1945.
D001815:Bloodletting / Q000266:history*; D005260:Female; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D009774:Obstetrics / Q000266:history; D011247:Pregnancy; D011248:Pregnancy Complications / Q000601:surgery; D014481:United States