title: Intrathecal morphine: a new method of obstetric analgesia?
mesh_terms: D000773:Anesthesia, Obstetrical / Q000379:methods*; D005260:Female; D006801:Humans; D007278:Injections, Spinal; D009020:Morphine / Q000008:administration & dosage*; D011247:Pregnancy
chemical_list: D009020:Morphine