Extradural obstetric analgesia.
D000056:Accident Prevention; D000767:Anesthesia, Epidural; D000773:Anesthesia, Obstetrical; D002404:Catheterization / Q000009:adverse effects; D004992:Ethics, Medical; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D011247:Pregnancy