title: Does dystocia during labor pose a risk factor for another non-progressive labor during the subsequent delivery?
abstract: OBJECTIVE
  To establish whether failure to progress during labor poses a risk factor for another non-progressive labor (NPL) during the subsequent delivery.
  
  
  METHODS
  A retrospective cohort study including singleton pregnancies that failed to progress during the previous labor and resulted in a cesarean section (CS) was conducted. Parturients were classified into three groups for both previous and subsequent labors: CS due to NPL stage I, stage II and an elective CS as a comparison group.
  
  
  RESULTS
  Of 202 462 deliveries, 10 654 women met the inclusion criteria: 3068 women were operated due to NPL stage I and 1218 due to NPL stage II. The comparison group included 6368 women. Using a multivariable logistic regression models, NPL stage I during the previous delivery was found as an independent risk factor for another NPL stage I in the subsequent labor (adjusted odds ratio [OR] = 2.9; 95% confidence interval [CI] = 2.4-3.7; p < 0.001). Similarly, NPL at stage I or II was found to be an independent risk factor for a NPL stage II during the subsequent labor (adjusted OR = 1.4; 95% CI = 1.1-2.1; p = 0.033; adjusted OR = 5.3; 95% CI = 3.7-7.5; p < 0.001; respectively).
  
  
  CONCLUSIONS
  A previous CS due to a NPL is an independent risk factor for another NPL in the subsequent pregnancy and for recurrent cesarean delivery.
authors.affiliation: Department of Obstetrics and Gynecology and.
authors.forename: Tal
authors.initials: T
authors.lastname: Tobias
authors.forename: Eyal
authors.initials: E
authors.lastname: Sheiner
authors.forename: Michael
authors.initials: M
authors.lastname: Friger
authors.forename: Ruslan
authors.initials: R
authors.lastname: Sergienko
authors.forename: Avi
authors.initials: A
authors.lastname: Harlev
mesh_terms: D000328:Adult; D002585:Cesarean Section; D004420:Dystocia / Q000453:epidemiology* / Q000601:surgery; D005260:Female; D006801:Humans; D007557:Israel / Q000453:epidemiology; D011247:Pregnancy; D012189:Retrospective Studies; D012307:Risk Factors; D055815:Young Adult
keywords: Cesarean section; dystocia; non-progressive labor; subsequent delivery