title: Recent advances in pain relief in childbirth. I. Inhalation and systemic analgesia.
mesh_terms: D000700:Analgesics / Q000008:administration & dosage*; D000769:Anesthesia, Inhalation; D000773:Anesthesia, Obstetrical; D003975:Diazepam / Q000008:administration & dosage; D005260:Female; D006801:Humans; D006985:Hyperventilation; D008431:Maternal-Fetal Exchange; D008614:Meperidine / Q000008:administration & dosage; D008733:Methoxyflurane; D009609:Nitrous Oxide; D010100:Oxygen; D010423:Pentazocine / Q000008:administration & dosage; D011175:Positive-Pressure Respiration; D011247:Pregnancy
chemical_list: D000700:Analgesics; D008733:Methoxyflurane; D008614:Meperidine; D009609:Nitrous Oxide; D003975:Diazepam; D010423:Pentazocine; D010100:Oxygen