title: Intrathecal morphine as sole analgesic during labour.
mesh_terms: D000773:Anesthesia, Obstetrical; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D009020:Morphine / Q000008:administration & dosage* / Q000009:adverse effects; D011247:Pregnancy
chemical_list: D009020:Morphine