Things to Consider When Using the VBAC Calculator

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Many providers use VBAC calculators to determine if someone is a good candidate for vaginal birth after cesarean (VBAC). Nevertheless, there are issues with the VBAC calculator that include racial and body size bias, discrepancies in accuracy, and issues with the “failure to progress” diagnosis associated with delayed labor. Furthermore, it is important to take into account whether one’s birth provider supports VBAC.

“Trying to predict who will have a VBAC is tricky. We know some individual factors, such as having a prior vaginal delivery, are associated with higher or lower VBAC rates. By combining various factors, VBAC calculators generate a percentage that represents the best guess for an individual’s odds of having a vaginal birth after cesarean.”