MDCalc

VBAC Risk Score for Successful Vaginal Delivery (Flamm Model)

Predicts likelihood of successful vaginal birth after previous caesarean section (VBAC).

Maternal age < 40 years
Vaginal birth history
Reason other than failure to progress for first cesarean delivery
Cervical effacement at admission
Cervical dilation ≥ 4 cm at admission

Result:

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Critical Actions

A low VBAC Risk Score does not predict failure.