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Favorites Specialties Drugs Guidelines Most Used

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APGAR Score Assisted Delivery (FIGO)BPP (Manning Score)Bishop Score CARPREG II Cardiac Risk Cervical Cancer Staging Contraceptive Pearl Index Doppler Matrix (UA/MCA)EFW (Hadlock)Endometrial Staging Endometrial Thickness FGR Criteria (Consensus)FSFI (Sexual Function)Ferriman-Gallwey Score Fetal Anemia (MCA PSV)GDM Diagnostic Criteria GPA History Indicator Gail Model Breast Risk Gestational Dating (LMP)HIV PMTCT Protocol IOTA Simple Rules IVF Due Date & AMH Iron Deficit (Ganzoni)Labour Progress (WHO)Maternal Sepsis (qSOFA)O-RADS Classification Ovarian Cancer Staging PAS Hemorrhage Risk PPH Protocol (FIGO)Preeclampsia (ACOG)Rho(D) Dose (K-B)Rotterdam PCOS Criteria Syphilis Management TORCH Framework VBAC Success Probability Vulvar Cancer Staging Weight Gain (IOM)mWHO Cardiac Risk

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VBAC Success Probability

Clinical Metrics

Age

BMI (kg/m2)

Indication for Prior CD

Guidelines & Evidence

Verified

Last Review: 2026

When to Use

When to Use

Antenatal counseling for patients with one prior low-transverse cesarean section (LTCS) contemplating Trial of Labor After Cesarean (TOLAC).

Standardizing shared decision-making regarding mode of delivery at 37 0/7 to 41 6/7 weeks gestation.

Informing patients of their individualized probability of successful vaginal birth versus repeat cesarean.

Patient Selection

Single prior low-transverse uterine incision.

Singleton pregnancy.

Cephalic presentation.

Term gestation (≥37 weeks).

Absolute Contraindications to TOLAC

Do not use this calculator or attempt TOLAC if: Prior classical or T-shaped uterine incision, prior uterine rupture, extensive transfundal uterine surgery (e.g., myomectomy), or any standard contraindication to vaginal delivery (e.g., placenta previa).

Last Comprehensive Review: 2026