title: Probability of cesarean delivery after successful external cephalic version.
abstract: OBJECTIVE
  To identify factors associated with cesarean delivery following successful external cephalic version (ECV).
  
  
  METHODS
  In a prospective study, data were obtained for ECV procedures performed at Cruces University Hospital, Spain, between March 2002 and June 2012. Women with a singleton pregnancy who had a successful, uncomplicated ECV and whose delivery was assisted at the study hospital, with the fetus in cephalic presentation, were included. A multivariate model of risk factors of cesarean delivery was developed.
  
  
  RESULTS
  Among 627 women included, 92 (14.7%) delivered by cesarean. A cesarean was performed among 33 (8.5%) of 387 women with spontaneous labor versus 59 (24.6%) of 240 who were induced (P < 0.001). Multivariate analysis showed that higher BMI (P = 0.006), labor induction (P = 0.001), and prior cesarean (P < 0.001) were associated with cesarean. Time between ECV and delivery was inversely associated with probability of cesarean during the first 2 weeks. Thus, the probabilities of cesarean delivery on the first day were 0.53 (95% CI 0.35-0.71) and 0.34 (95% CI 0.18-0.51) following induced and spontaneous labor, respectively. On the seventh day, the probabilities were 0.23 (95% CI 0.15-0.32) and 0.12 (95% CI 0.07-0.18), respectively.
  
  
  CONCLUSIONS
  Following ECV, induction of labor, an interval of less than 2 weeks to delivery, BMI, and previous cesarean were associated with an increased risk of cesarean.
authors: Obstetrics and Gynecology Service, BioCruces Health Research Institute, Hospital Universitario Cruces (UPV/EHU), Barakaldo, Biscay, Spain. Electronic address: jburgoss@sego.es.
authors: Jorge
authors: J
authors: Burgos
authors: Obstetrics and Gynecology Service, BioCruces Health Research Institute, Hospital Universitario Cruces (UPV/EHU), Barakaldo, Biscay, Spain.
authors: María
authors: M
authors: Iglesias
authors: Clinical Epidemiology Unit, BioCruces Health Research Institute, Hospital Universitario Cruces (UPV/EHU), Barakaldo, Biscay, Spain; CIBER Epidemiología y Salud Pública, Biscay, Spain.
authors: José I
authors: JI
authors: Pijoan
authors: Obstetrics and Gynecology Service, BioCruces Health Research Institute, Hospital Universitario Cruces (UPV/EHU), Barakaldo, Biscay, Spain.
authors: Leire
authors: L
authors: Rodriguez
authors: Obstetrics and Gynecology Service, BioCruces Health Research Institute, Hospital Universitario Cruces (UPV/EHU), Barakaldo, Biscay, Spain.
authors: Luis
authors: L
authors: Fernández-Llebrez
authors: Obstetrics and Gynecology Service, BioCruces Health Research Institute, Hospital Universitario Cruces (UPV/EHU), Barakaldo, Biscay, Spain.
authors: Txantón
authors: T
authors: Martínez-Astorquiza
mesh_terms: D000328:Adult; D002585:Cesarean Section / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D015999:Multivariate Analysis; D011247:Pregnancy; D011446:Prospective Studies; D012307:Risk Factors; D013030:Spain; D013997:Time Factors; D014710:Version, Fetal / Q000379:methods
keywords: Breech presentation; Cesarean delivery; Fetus; Induced labor; Labor; Pregnancy; Version