Epidural analgesia in labour: the past, the present and the future.
D000767:Anesthesia, Epidural / Q000009:adverse effects / Q000592:standards / Q000706:statistics & numerical data; D000773:Anesthesia, Obstetrical; D000776:Anesthesiology / Q000639:trends; D036861:Delivery, Obstetric; D005260:Female; D006801:Humans; D007744:Obstetric Labor Complications; D011247:Pregnancy