title: Spontaneous versus induced labor after a previous cesarean delivery.
abstract: OBJECTIVE
  To compare maternal and neonatal outcomes in spontaneous versus induced labor after one previous cesarean delivery.
  
  
  METHODS
  Women with one previous cesarean delivery who had spontaneous labor between January 1992 and January 2000 were compared with those whose labor was induced.
  
  
  RESULTS
  Three thousand seven hundred forty-six patients had a trial of labor (2943 spontaneous, 803 induced). Those induced had more frequent early postpartum hemorrhage (7.3% versus 5.0%; odds ratio [OR] 1.66; 95% confidence interval [CI] 1.18, 2.32), cesarean delivery (37.5% versus 24.2%; OR 1.84; 95% CI 1.51, 2.25), and neonatal intensive care unit (NICU) admission (13.3% versus 9.4%; OR 1.69; 95% CI 1.25, 2.29). There was a trend toward higher uterine rupture rates in those with induced versus spontaneous labor (0.7% versus 0.3%, P =.128) and for patients undergoing dinoprostone (prostaglandin E(2)) induction versus other methods (1.1% versus 0.6%, P =.62), although neither difference achieved statistical significance.
  
  
  CONCLUSIONS
  Induced labor is associated with an increased rate of early postpartum hemorrhage, cesarean delivery, and neonatal ICU admission. The higher rate of uterine rupture in those who had labor induced was not statistically significant.
authors.affiliation: Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Dalhousie University, Halifax, Nova Scotia, Canada. martinadelaney@hotmail.com
authors.forename: Tina
authors.initials: T
authors.lastname: Delaney
authors.forename: David C
authors.initials: DC
authors.lastname: Young
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D002585:Cesarean Section / Q000706:statistics & numerical data; D015331:Cohort Studies; D015232:Dinoprostone / Q000627:therapeutic use; D005260:Female; D005500:Follow-Up Studies; D005865:Gestational Age; D006801:Humans; D007226:Infant Mortality / Q000639:trends*; D007231:Infant, Newborn; D007751:Labor, Induced / Q000379:methods* / Q000401:mortality; D008428:Maternal Mortality / Q000639:trends*; D007744:Obstetric Labor Complications / Q000401:mortality; D010120:Oxytocics / Q000627:therapeutic use; D010298:Parity; D011247:Pregnancy; D011336:Probability; D012016:Reference Values; D012307:Risk Factors; D014597:Uterine Rupture / Q000209:etiology / Q000401:mortality; D016064:Vaginal Birth after Cesarean / Q000379:methods* / Q000401:mortality
chemical_list: D010120:Oxytocics; D015232:Dinoprostone