First year of an obstetric epidural service.
D000698:Analgesia; D000767:Anesthesia, Epidural; D000773:Anesthesia, Obstetrical; D002045:Bupivacaine; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D011247:Pregnancy
D002045:Bupivacaine