 The goal of epidural analgesia during labour is to obtain an analgesia with a minimum of motor block. Absence of motor block at the time of the childbirth allows to decrease the rate of instrumentation forceps, vacuum extractor. When the parturient approach complete cervical dilatation 8-10 cm, the anaesthetist must perform a last epidural injection for perineal analgesia. Generally a local anaesthetic is used ex : Ropivacaine. Adjuvant can be associated to local anaesthetic Sufentanil, Clonidine and more recently Neostigmine to maximize local anaesthetic without increasing motor block. 