Obstetrics and Gynecology

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VBAC Calculator

Estimates the probability of successful vaginal birth after a previous cesarean delivery.

Maternal age < 40 years

No0 Yes+2

Vaginal birth history

Vaginal birth before and after first cesarean delivery+4 Vaginal birth after first cesarean delivery+2 Vaginal birth before cesarean delivery+1 No previous vaginal birth0

Reason other than failure to progress for first cesarean delivery

No0 Yes+1

Cervical effacement at admission

>75%+2 25-75%+1 <25%0

Cervical dilation >= 4 cm at admission

No0 Yes+1

Complete the fields and press Calculate.

Note: MedicalC is NOT medical software and does NOT issue diagnoses or treatment recommendations. The calculators are for educational and informational purposes, use published medical formulas, and are not a substitute for medical consultation. Results should be interpreted by professionals.Read the full disclaimer.

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