Vaginal birth after cesarean: a 10-year experience

Obstet Gynecol. 1994 Aug;84(2):255-8.


Objective: To report the changing incidence of previous cesarean delivery, and the increasing use and success of a trial of labor and its effect on the repeat cesarean rate.

Methods: Between 1983-1992, there were 164,815 deliveries at Los Angeles County+University of Southern California Women's Hospital, of which 17,322 (10.5%) were to women with at least one previous cesarean delivery. Data were gathered on an ongoing basis from delivery logs and patient charts.

Results: Women with at least one previous cesarean accounted for 8.1% of all deliveries in 1983, increasing to 14.1% by 1992. Trial of labor was used in 80% of women with one previous cesarean, in 54% with two, and in 30% with three or more. The success rate was significantly higher with one previous cesarean (83%) than with two or more (75.3%). Furthermore, uterine rupture was three times more common with two or more previous cesareans. Compared to a policy of routine repeat cesarean, trial of labor yielded a 6.4% lower cesarean delivery rate. The majority of this benefit (5.5%) was derived by women with one previous cesarean. Among women undergoing a trial of labor, there were three rupture-related perinatal deaths and a single rupture-related maternal death.

Conclusion: Substantial reduction in the cesarean rate is achieved safely and efficiently by encouraging a trial of labor in women with a single previous cesarean delivery.

MeSH terms

  • Cesarean Section / statistics & numerical data*
  • Female
  • Humans
  • Incidence
  • Infant, Newborn
  • Pregnancy
  • Pregnancy Outcome / epidemiology*
  • Risk Factors
  • Time Factors
  • Trial of Labor*
  • Vaginal Birth after Cesarean / statistics & numerical data*