title: Obstetric consequences of epidural analgesia in nulliparous patients.
mesh_terms: D000698:Analgesia; D000765:Anesthesia, Conduction; D000773:Anesthesia, Obstetrical; D001315:Australia; D005113:Extraction, Obstetrical; D005260:Female; D005843:Geography; D006801:Humans; D007231:Infant, Newborn; D007743:Labor, Obstetric; D008722:Methods; D009119:Muscle Contraction; D009321:Natural Childbirth; D007744:Obstetric Labor Complications; D010298:Parity; D011187:Posture; D011247:Pregnancy; D011446:Prospective Studies; D044469:Racial Groups; D013997:Time Factors; D014599:Uterus / Q000502:physiology