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Using Angle of Progression and Cervical Consistency Index to Predict Induction of Labor Success


Title Using Angle of Progression and Cervical Consistency Index to Predict Induction of Labor Success
Therapeutic Area Labor and Delivery, Induced Labor
Principal Investigator Michael House, MD
Min Age 18 Years
Max Age 50 Years
Gender Female
Contact Ashley Peterson, MD
617 320-6128

Overview

The aim of this study is to compare ultrasound measurements from women who undergo successful induction of labor (defined as a vaginal delivery or operative vaginal delivery) with those with failed induction of labor (defined as a cesarean section). We will obtain ultrasound measurements prior to start of induction. Ultrasound measurements that will be measured will be angle of progression (AOP) and cervical consistency index (CCI). We expect to reproduce the finding of other studies and see a narrow angle of progression (<95 degrees) associated with failed induction of labor and a wide angle of progress (>120 degrees) associated with successful induction. We also expect to find an inverse relationship between CCI (measured in %) and induction success. In addition, we hypothesize that the combination of narrow AOP and low CCI has increased positive predictive value for induction sucess.

Study Details

Inclusion Criteria

  • Pregnant Female
  • ≥ 24 0/7 weeks gestational age.

Exclusion Criteria

  • History of cesarean section
  • Undiagnosed vaginal bleeding

Study Requirements

Participants will undergo ultrasound evaluation using transperineal and transvaginal probes during one session on Labor and Delivery at the time of admission to the hospital for induction of labor.