title: Is a breech presentation at term more frequent in women with a history of cesarean delivery?
abstract: OBJECTIVE
  The purpose of this study was to determine whether breech presentation at term is more common among women with at least 1 previous cesarean delivery.
  
  
  METHODS
  This historic cohort study (n = 84,688) included women with a singleton term pregnancy and at least 1 previous delivery. Results were expressed as crude relative risks and adjusted odds ratios.
  
  
  RESULTS
  While 2.46% of women had a fetus in breech presentation at term, 14.91% of women had had 1 or more previous cesareans. The relative risk of a breech presentation at term for women with a history of cesarean was 2.18 (95%CI: 1.98-2.39). It did not differ according to the number of previous cesareans. The logistic regression analysis took into account confounding factors including gestational age, maternal age, parity, birthweight, and oligohydramnios. The adjusted odds ratio was 2.12 (95%CI: 1.91-2.36).
  
  
  CONCLUSIONS
  Women with previous cesarean deliveries have a risk of breech presentation at term twice that of women with previous vaginal deliveries.
authors.affiliation: Association des Utilisateurs de Dossiers Informatisés en Pédiatrie, Obstétrique et Gynécologie sentinel network, Lyon, France. fvendittelli@chuclermontferrand.fr
authors.forename: Françoise
authors.initials: F
authors.lastname: Vendittelli
authors.forename: Olivier
authors.initials: O
authors.lastname: Rivière
authors.forename: Catherine
authors.initials: C
authors.lastname: Crenn-Hébert
authors.forename: Marc-Alain
authors.initials: MA
authors.lastname: Rozan
authors.forename: Bernard
authors.initials: B
authors.lastname: Maria
authors.forename: Bernard
authors.initials: B
authors.lastname: Jacquetin
mesh_terms: D000328:Adult; D015992:Body Mass Index; D001946:Breech Presentation / Q000453:epidemiology*; D002921:Cicatrix / Q000453:epidemiology; D015986:Confounding Factors, Epidemiologic; D005260:Female; D005602:France / Q000453:epidemiology; D006801:Humans; D016015:Logistic Models; D008423:Maternal Age; D016017:Odds Ratio; D011247:Pregnancy; D012307:Risk Factors; D012907:Smoking / Q000453:epidemiology; D016064:Vaginal Birth after Cesarean / Q000706:statistics & numerical data*