What VBAC success probability warrants TOLAC recommendation?

ACOG suggests TOLAC is reasonable when success probability is 60-80% or higher. Individual risk-benefit discussion is essential. Centers offering TOLAC must have immediate cesarean capability per ACOG guidelines.

What factors increase VBAC success?

Prior vaginal delivery (especially prior VBAC), spontaneous labor onset, favorable Bishop score, prior non-recurrent cesarean indication, lower BMI, younger age, and white/Hispanic ethnicity in the Grobman model.

What is the uterine rupture risk in TOLAC?

Uterine rupture risk in TOLAC is 0.5-0.9% (1 in 100-200 women). Risk is higher with single-layer uterine closure, prior classical incision, and labor induction with oxytocin. Misoprostol for IOL is relatively contraindicated.

VBAC/TOLAC Success Probability Calculator (Grobman Model)

Estimate probability of vaginal birth after cesarean (VBAC) using the Grobman nomogram. Inputs include age, BMI, prior vaginal delivery, prior VBAC, prior cesarean indication, cervical exam, and ethnicity.

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Bishop Score IOL

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VBAC/TOLAC Success Probability Calculator (Grobman Model)

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Frequently Asked Questions

What VBAC success probability warrants TOLAC recommendation?

What factors increase VBAC success?

What is the uterine rupture risk in TOLAC?