title: [Mechanisms of the stagnation of dilatation in the active phase of labor].
abstract: OBJECTIVE
  Our study was designed to explain determinants of nonprogressive labor in nulliparous patients.
  
  
  METHODS
  One hundred consecutive nulliparous patients have got a cesarean section for active-phase arrest of labor after two hours of active management. Intrauterine pressure was monitored for all of them and a X-ray pelvimetry was done after surgery.
  
  
  RESULTS
  Eighty-three percent of patients showed X-ray data considered as normal; hypotonic labor was found in 50% of cases and occiput posterior position in 60%.
  
  
  CONCLUSIONS
  Our results suggest that occiput position and functional dystocia are more common in case of nonprogressive labor than abnormal measurements of the obstetrical pelvis.
authors.affiliation: Clinique gynécologique et obstétricale, CHU Charles Nicolle, 1, rue de Germont, 76038 Rouen, France. loic.marpeau@chu-rouen.fr
authors.forename: L
authors.initials: L
authors.lastname: Marpeau
authors.forename: F
authors.initials: F
authors.lastname: Sergent
authors.forename: F
authors.initials: F
authors.lastname: Manson
authors.forename: E
authors.initials: E
authors.lastname: Verspyck
authors.forename: D
authors.initials: D
authors.lastname: Eurin
mesh_terms: D004420:Dystocia / Q000150:complications*; D005260:Female; D006801:Humans; D007746:Labor Presentation; D007747:Labor Stage, First; D007748:Labor Stage, Second; D007744:Obstetric Labor Complications / Q000209:etiology*; D010298:Parity; D010388:Pelvis / Q000002:abnormalities / Q000033:anatomy & histology; D011247:Pregnancy; D011256:Pregnancy Outcome
vernacular_title: Mécanismes des stagnations de la dilatation en phase active du travail.