Epidural fentanyl in labour.
D000293:Adolescent; D000328:Adult; D000767:Anesthesia, Epidural; D000773:Anesthesia, Obstetrical; D005260:Female; D005283:Fentanyl / Q000008:administration & dosage / Q000097:blood; D005312:Fetal Blood / Q000032:analysis; D006801:Humans; D007743:Labor, Obstetric; D011247:Pregnancy
D005283:Fentanyl