Clinical Research Directory

Inclusion Criteria: * Age ≥ 18 years * Nulliparous women (i.e. no previous pregnancy beyond 20 weeks) * With singleton gestation. Twin gestation reduced to singleton, either spontaneously or therapeutically, is not eligible unless the reduction occurred before 14 weeks project gestational age * Gestational age at randomization between 37 weeks of gestation 0 day and 38 weeks of gestation 6 days inclusive based on the crown rump length measured at the first trimester ultrasound before 14 weeks of gestation and 0 day, as recommended in France * Affiliated or beneficiary to a health security system * Signed informed consent Exclusion Criteria: * Project gestational age at date of first ultrasound \> 14 weeks * Plan for induction of labor prior to 40 weeks 5 days * Plan for cesarean delivery or contraindication to labor * Breech presentation * Multiple pregnancy * Signs of labor (regular painful contractions with cervical change) * Fetal demise or known major fetal anomaly * Heparin or low-molecular weight heparin during the current pregnancy * Placenta previa, accreta, vasa previa * Active vaginal bleeding greater than bloody show * Ruptured membranes * Cerclage in current pregnancy * Known oligohydramnios, defined as Amniotic Fluid Index \< 5 or Maximal Vertical Pocket \< 2 cm * Fetal growth restriction, defined as Estimated Fetal Weight \< 10th percentile according to local curve * Known HIV positivity because of modified delivery plan * Major maternal medical illness associated with increased risk for adverse pregnancy outcome (for example, any diabetes mellitus, lupus, any hypertensive disorder, cardiac disease, renal insufficiency) * Refusal of blood products * Contraindication to oxytocin * Participation in another interventional study that influences management of labor or delivery (labor induction, operative vaginal delivery, cesarean section, shoulder dystocia) * Delivery planned elsewhere at a non-Network site * History of myomectomy by laparotomy or laparoscopy * Previous metroplasty for uterine malformation or Asherman syndrome * Patient under legal protection * Poor understanding of the French language