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VBAC Risk Score for Successful Vaginal Delivery (Flamm Model)
Calculators
Calculator
Background
Authors
References
Maternal age < 40 years
No
0
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 birth
0
Reason other than failure to progress for first cesarean delivery
No
0
Yes
1
Cervical effacement at admission
> 75%
2
25-75%
1
< 25%
0
Cervical dilation ≥ 4 cm at admission
No
0
Yes
1
Result:
Background
Result Interpretation
Ranges Ranges