title: Clinical factors to predict the outcome of external cephalic version: a metaanalysis.
abstract: OBJECTIVE
  The objective of the study was to systematically review the medical literature reporting on potential clinical prognosticators for the outcome of external cephalic version (ECV).
  
  
  METHODS
  Medline, EMBASE, and Cochrane Central Register of Controlled Trials were searched. Studies reporting on potential clinical prognosticators and ECV success rates that allowed construction of a 2 x 2 table were selected.
  
  
  RESULTS
  We detected 53 primary articles reporting on 10,149 women. Multiparity (P >/= 1.00; odds ratio [OR], 2.5; 95% confidence interval [CI], 2.3-2.8), nonengagement of the breech (OR, 9.4; 95% CI, 6.3-14), a relaxed uterus (OR, 18; 95% CI, 12-29), a palpable fetal head (OR, 6.3; 95% CI, 4.3-9.2), and maternal weight less than 65 kg (OR, 1.8; 95% CI, 1.2-2.6) were predictors for successful external cephalic version.
  
  
  CONCLUSIONS
  Success of an ECV attempt is associated with clinical factors. This should be taken into account in the counseling of women prior to an ECV attempt.
authors.affiliation: Department of Obstetrics and Gynecology, Academic Medical Center, Amsterdam, The Netherlands.
authors.forename: Marjolein
authors.initials: M
authors.lastname: Kok
authors.forename: Jeltsje
authors.initials: J
authors.lastname: Cnossen
authors.forename: Lonneke
authors.initials: L
authors.lastname: Gravendeel
authors.forename: Joris
authors.initials: J
authors.lastname: van der Post
authors.forename: Brent
authors.initials: B
authors.lastname: Opmeer
authors.forename: Ben Willem
authors.initials: BW
authors.lastname: Mol
mesh_terms: D000328:Adult; D001720:Birth Injuries / Q000453:epidemiology* / Q000517:prevention & control; D001946:Breech Presentation / Q000000981:diagnostic imaging*; D002585:Cesarean Section / Q000379:methods / Q000706:statistics & numerical data; D005260:Female; D005500:Follow-Up Studies; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D010298:Parity; D011237:Predictive Value of Tests; D011247:Pregnancy; D011256:Pregnancy Outcome; D016032:Randomized Controlled Trials as Topic; D018570:Risk Assessment; D014463:Ultrasonography; D014710:Version, Fetal / Q000379:methods*; D055815:Young Adult