Study of the Type of Pushing at Delivery

Inclusion Criteria: * Patients will be women: * who are nulliparas or multiparas (≥ 1 previous child), * who attended the complete training session on the types of pushing assessed in this trial; during prenatal childbirth preparation and parenthood classes (regardless of the type of prenatal preparation) * for whom a vaginal delivery was planned at the end of pregnancy, * admitted to the maternity ward between 37 and 42 weeks of gestation (≥ 37 weeks and ≤ 42 weeks) in spontaneous or induced labor, * with cervical dilatation ≥ 7 cm, * with a singleton pregnancy in cephalic presentation, * who provided informed consent in writing * and speaks and writes French. Exclusion Criteria: * Women who are : * minors, * adults but incapable of providing consent for the study, * with a disorder contraindicating prolonged pushing, * with a uterine scar (previous cesarean or other surgery), * with a contraindication to vaginal delivery, * with a maternal disease that could justify in the short-term termination of the pregnancy (HELLP syndrome, preeclampsia \[hypertension with albuminuria \> 0.3 g by 24 hours\], eclampsia, abruptio placentae, etc.), * with a major genital hemorrhage, * with a major fetal malformation and/or hydramnios or oligohydramnios, and/or FGR (\<5°percentile), diagnosed in utero, * with a fetal heart rate anomaly before randomization, * with an in utero fetal death, * with a multiple pregnancy.