Scoring System for Breech Vaginal Delivery Assessment
The feto-pelvic scoring system is the established scoring method used to assess eligibility for vaginal breech delivery, incorporating maternal pelvimetric measurements, estimated fetal weight, type of breech presentation, and previous obstetric history. 1
The Feto-Pelvic Scoring System
The validated scoring system assigns a maximum of 20 points based on the following parameters:
- Maternal pelvimetric data (pelvic dimensions and adequacy)
- Estimated fetal weight
- Type of breech presentation (frank, complete, or footling)
- Previous obstetric history (prior vaginal deliveries)
Decision Threshold
A score of 12 points or less indicates cesarean section should be performed, while scores above 12 suggest vaginal delivery may be attempted under appropriate conditions 1. This scoring system allowed for planned cesarean section in 83% of cases where it was indicated, demonstrating its utility in prospective decision-making.
Clinical Context and Outcomes
When this scoring system was applied to 224 singleton breech deliveries, 70.5% of appropriately selected patients achieved vaginal delivery with excellent outcomes—corrected perinatal mortality of 8.9 per 1000, which was not significantly different from cephalic presentations 1. The 5-minute Apgar scores were similar whether delivered vaginally or by cesarean section when proper selection criteria were applied.
Important Caveats
Predictive scoring models have inherent limitations and cannot definitively determine which women have higher risk of requiring intrapartum cesarean section 2. The AAFP guidelines note that these models have "limited value" in absolute risk stratification, though they remain useful for initial counseling and planning.
Modern Adjuncts Under Investigation
Recent research has explored 3D body scanner anthropometry as an alternative to MR-pelvimetry, showing comparable or superior predictive value (AUC 0.71 for waist girth to height ratio versus AUC 0.62 for MRI-measured obstetric conjugate) 3. However, these remain investigational and are not yet standard practice.
Essential Prerequisites for Vaginal Breech Delivery
Regardless of scoring, successful vaginal breech delivery requires:
- Strict case selection using the feto-pelvic scoring system
- Experienced operators skilled in breech delivery techniques
- Continuous electronic fetal heart rate monitoring throughout labor 1, 4
- Immediate access to cesarean section if complications arise
The feto-pelvic scoring system remains the primary validated tool for this assessment, though clinical judgment incorporating multiple factors—including progression in labor and Bishop score—should guide final delivery decisions 2.