60% of inductions of preterm pregnancy result in vaginal delivery

Access to the full content of this site is available only to registered healthcare professionals. Register to read more


  • 60% of inductions of preterm pregnancies result in vaginal delivery.

Why this matters

  • Many indicated preterm deliveries are performed by cesarean delivery (CD) without a trial of labor because of an unfavorable cervix and a perceived high failure rate.
  • Vaginal delivery is associated with lower maternal morbidity compared with a CD.

Key results

  • 62.8% delivered vaginally.
  • Women who had a CD were more likely to be nulliparous (55.3% vs 43.8%; P=.04), less likely to have had a prior vaginal delivery (35.0% vs 54.8%; P<.01), had a higher body mass index (35.8 vs 32.6 kg/m2; P<.01), were more likely to have chronic hypertension (37.4% vs 13.9%; P<.01), and were more likely to have preeclampsia (87.8% vs 67.3%; P<.01).
  • The prediction model had different sensitivities/specificities at different gestational ages; sensitivity was 9.5%-88%, and specificity was 33.3%-76.9%.

Study design

  • Retrospective cohort study.
  • Singleton pregna...