Morphine and the fetal heart rate.
D000773:Anesthesia, Obstetrical; D005260:Female; D005318:Fetal Heart / Q000187:drug effects*; D006339:Heart Rate / Q000187:drug effects*; D006801:Humans; D008431:Maternal-Fetal Exchange; D009020:Morphine / Q000494:pharmacology*; D011247:Pregnancy
D009020:Morphine