Obstetric anesthesia; Shane-Ashman method in 1131 deliveries.
D000698:Analgesia; D000758:Anesthesia; D000760:Anesthesia and Analgesia; D000769:Anesthesia, Inhalation; D000773:Anesthesia, Obstetrical; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D009609:Nitrous Oxide; D059408:Pain Management; D011247:Pregnancy
D009609:Nitrous Oxide
ANESTHESIA, INHALATION; LABOR/anesthesia and analgesia; NITROUS OXIDE/anesthesia and analgesia