Aim: Investigating if some factors associated with length of the second stage of labour are the same among normal labouring women with or without epidural analgesia. Materials and Methods. On a sample of 92 women, a correspondence analysis among factor associated with a long lasting second stage of labour and interventions for accelerate birth was built. The length of the second stage of labour was corrected in case of epidural or non-epidural analgesia, because epidural analgesia can normally prolong the second stage of labour. Results. Epidural analgesia is associated to both a normal course of the second stage of labour (between 25^th and 75^th centiles) and with a long lasting second stage of labour (> 90^th centile). Even Kristeller maneuvers and oxytocin infusion are associated both to the > 90^th centiles and to the 25^th and 75^th centiles, and to the 75^th and 90^th centiles ranges of length. Conclusions. Epidural analgesia can sometimes cause an abnormal prolongation of the second stage of labour, justifying some obstetrical interventions to shorten it.