Accidental dural puncture.
D000328:Adult; D000767:Anesthesia, Epidural / Q000009:adverse effects*; D000773:Anesthesia, Obstetrical / Q000009:adverse effects*; D001769:Blood; D004388:Dura Mater / Q000293:injuries*; D005260:Female; D006801:Humans; D011247:Pregnancy