Obstetrics

VBAC Success Predictor Calculator

Vaginal birth after cesarean success probability

Clinical use

Use this calculator for vaginal birth after cesarean success probability in theobstetrics workflow. It is decision support and should be interpreted with the patient context, local protocols, and clinician judgment.

Interpretation

Success rate 60-80% overall. Model estimates individualised probability. Contraindications: prior classical incision, prior uterine rupture, placenta previa.

Required inputs

Maternal Age
Bmi Under 30
Prior Vaginal Delivery
Prior Vbac
Recurrent Cs Indication
Favorable Cervix
Spontaneous Labor

Optional: Prior Uterine Rupture, Classical Incision

Evidence and limitations

This page cites 1 published reference. Confirm units and inclusion criteria before applying the output; calculators do not replace assessment, escalation, or local policy.

References

Grobman WA et al. Obstet Gynecol 2007;109:806-812

Frequently asked questions

What is the VBAC Success Predictor?

VBAC Success Predictor is a clinical calculator used for Vaginal birth after cesarean success probability.

How do I interpret the VBAC Success Predictor?

Success rate 60-80% overall. Model estimates individualised probability. Contraindications: prior classical incision, prior uterine rupture, placenta previa.

What inputs are required for the VBAC Success Predictor?

Required inputs include Maternal Age, Bmi Under 30, Prior Vaginal Delivery, Prior Vbac, Recurrent Cs Indication, Favorable Cervix, Spontaneous Labor. Optional inputs include Prior Uterine Rupture, Classical Incision.