title: Effects of nitrous oxide and fentanyl anesthesia on fetal heart-rate variability intra- and postoperatively.
mesh_terms: D000328:Adult; D000758:Anesthesia / Q000009:adverse effects*; D005260:Female; D005283:Fentanyl; D005318:Fetal Heart / Q000187:drug effects*; D006339:Heart Rate / Q000187:drug effects*; D006801:Humans; D007431:Intraoperative Complications; D007743:Labor, Obstetric / Q000187:drug effects; D009609:Nitrous Oxide; D011183:Postoperative Complications; D011247:Pregnancy
chemical_list: D009609:Nitrous Oxide; D005283:Fentanyl