title: A historical perspective on the obstetric chair.
mesh_terms: D036861:Delivery, Obstetric; D004739:England; D005060:Europe; D049690:History, Ancient; D049691:History, Medieval; D049711:History, Modern 1601-; D008880:Midwifery / Q000266:history*; D009774:Obstetrics / Q000266:history*; D014481:United States