Additionally, the long term effects of EBP remain either unknown or vaguely understood. Are we treating an acute symptom with an invasive method, not knowing the long term sequelae? Since audiometric changes are known to result following ADP, can these changes persist over a long period of time? Therefore, we are interested in assessing the long term effects of EBP on backache, headache and audiometric changes in parturients who delivered during the years 2005 - 2011.