Prolonged labour in primigravid patients with special reference to the use of caudal block and the vacuum extractor.
D000328:Adult; D000765:Anesthesia, Conduction; D000773:Anesthesia, Obstetrical; D005113:Extraction, Obstetrical; D005260:Female; D006801:Humans; D007751:Labor, Induced; D007744:Obstetric Labor Complications / Q000628:therapy*; D011247:Pregnancy