[On a new aspect of obstetrical analgesia: the combined use of pethidine and a morphine antagonist in labor].
D016362:Analgesia, Obstetrical; D000758:Anesthesia; D000773:Anesthesia, Obstetrical; D000776:Anesthesiology; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D008614:Meperidine; D009020:Morphine; D009269:Nalorphine; D011247:Pregnancy
D009020:Morphine; D008614:Meperidine; D009269:Nalorphine
ANESTHESIA, OBSTETRICAL; MEPERIDINE; NALORPHINE