Calculate VBAC Success Probability

Maternal Age (Years)

Mother's current age in years

Pre-pregnancy BMI

Body Mass Index before pregnancy

Previous VBAC Success No previous VBAC Yes, had successful VBAC Attempted VBAC but failed

History of previous VBAC attempts

Reason for Previous Cesarean Breech presentation Failure to progress Fetal distress Placenta previa Maternal request Other medical reason

Primary reason for the previous cesarean

Time Since Last Cesarean (Months)

Months since the last cesarean delivery

Current Gestational Age (Weeks)

Current pregnancy week

Current Pregnancy Factors (Select all that apply)

Induced labor

Planning epidural

Large baby (estimated >4kg)

Post-term pregnancy (>41 weeks)

Gestational diabetes

Hypertension/preeclampsia

Hospital VBAC Support High support (VBAC-friendly) Medium support Low support

Level of VBAC support at your hospital

Calculate VBAC Success Reset

About VBAC

VBAC (Vaginal Birth After Cesarean) is the attempt to deliver vaginally after a previous cesarean section. Success rates vary based on multiple factors.

Success Categories:

• High: >80% success probability
• Moderate: 60-80% success probability
• Low: <60% success probability

Positive Factors:

• • Previous vaginal delivery
• • Spontaneous labor
• • Younger maternal age
• • Normal BMI
• • Adequate time since C-section

Risk Factors:

• • Previous uterine rupture
• • Classical C-section incision
• • Induced labor
• • Advanced maternal age
• • Obesity
• • Large baby