VBAC Calculator

Estimates probability of successful vaginal birth after cesarean (TOLAC success)

Indication

Estimates probability of successful vaginal birth after cesarean (TOLAC success)

id: prior_vaginal; label: Prior vaginal delivery (including prior VBAC); type: yesno
id: recurring_indication; label: Recurring indication for prior cesarean (e.g., CPD, FTP); type: yesno
id: age_under_35; label: Age < 35; type: yesno
id: bmi_under_30; label: BMI < 30; type: yesno
id: favorable_cervix; label: Favorable cervical exam at admission (dilated, effaced); type: yesno
id: spontaneous_labor; label: Spontaneous labor (not induced); type: yesno

function(score) { if (score >= 5) return { risk: score + '/6 favorable factors', tier: 'High Probability of VBAC Success', action: 'Estimated VBAC success >75%. TOLAC reasonable with appropriate counseling and monitoring. Continuous EFM required.', color: 'green' }; if (score >= 3) return { risk: score + '/6 favorable factors', tier: 'Moderate Probability', action: 'Estimated VBAC success ~60-75%. Shared decision-making. Ensure surgical team immediately available.', color: 'yellow' }; return { risk: score + '/6 favorable factors', tier: 'Lower Probability', action: 'Estimated VBAC success <60%. Discuss risks/benefits thoroughly. Elective repeat cesarean is reasonable alternative.', color: 'red' }; }