title: 150 years in pursuit of optimal pain relief during labour.
authors.affiliation: University of colorado school of medicine, Aurora, Co, USA.
authors.forename: Joy L
authors.initials: JL
authors.lastname: Hawkins
mesh_terms: D005260:Female; D049672:History, 19th Century; D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D048949:Labor Pain / Q000188:drug therapy*; D007743:Labor, Obstetric; D059408:Pain Management / Q000266:history* / Q000379:methods; D011247:Pregnancy