Alternative to Intensive Management of the Active Phase of the Second Stage of Labor

Inclusion Criteria : * primiparous women * singleton fetus * fetal cephalic presentation * ≥37 gestational weeks * living fetus * Patient with epidural analgesia * Major Female * Women understand French Exclusion Criteria : * Abnormal fetal heart rate requiring hastening childbirth * cervical dilatation \< 8 cm * intrauterine fetal growth restriction \<5e percentile, * Fetal malformation, * history of gynecological surgery with uterine scar * Women do not understand French, * women with psychiatric condition * contraindication to intensive management of active second stage (severe myopia, respiratory or cardiac failure) * no affiliation to a social security scheme (beneficiary or assignee)