title: More experience with intrathecal morphine for obstetric analgesia.
mesh_terms: D000328:Adult; D000698:Analgesia; D000773:Anesthesia, Obstetrical; D005260:Female; D006801:Humans; D007278:Injections, Spinal; D008297:Male; D009020:Morphine; D011247:Pregnancy
chemical_list: D009020:Morphine