Obstetrics

VBAC / TOLAC Success Predictor (MFMU)

Predicts probability of successful vaginal birth after cesarean section.

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Parameters

VBAC / TOLAC Success Predictor (MFMU) Result

Formula

Logit(P) = -0.742 - (0.037 × Age) - (0.038 × BMI) + Race Coefficient + (0.915 × Prior Vaginal) + (0.689 × Prior VBAC) - (0.611 × Recurring Arrest Indication)

Clinical Pearls

Aids patient-centered counseling regarding the risks and benefits of trial of labor after cesarean vs. planned elective repeat cesarean section.

Limitations

Validated for individuals with one prior low transverse cesarean section; does not assess uterine rupture risk directly (baseline rupture risk ~0.5% - 0.9%).