Preterm VBAC Calculator

Chronic hypertension? No Yes Diabetes (gestational or pregestational)? No Yes Any previous vaginal delivery? No Yes Any vaginal delivery since last cesarean? No Yes Indication for prior cesarean of arrest of dilation or descent? No Yes Hypertensive disease of pregnancy (gestational hypertension, preclampsia, or superimposed preclampsia)? No Yes Dilation 0 1 2 3 4 5 6 cm Labor induction? No Yes

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Mardy AH, Ananth CV, Grobman WA, et al. A prediction model of vaginal birth after cesarean in the preterm period. Am J Obstet Gynecol 2016;215:513.e1-7.