title: Analgesia during labor: a comparison of pentobarbital, meperidine, and morphine.
mesh_terms: D000698:Analgesia; D000758:Anesthesia; D000760:Anesthesia and Analgesia; D000773:Anesthesia, Obstetrical; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D008614:Meperidine; D009020:Morphine / Q000628:therapy*; D059408:Pain Management; D010424:Pentobarbital; D011247:Pregnancy
chemical_list: D009020:Morphine; D008614:Meperidine; D010424:Pentobarbital
keywords: ANESTHESIA, OBSTETRICAL; MEPERIDINE/anesthesia and analgesia; MORPHINE/therapy; PENTOBARBITAL/anesthesia and analgesia