Assess pre‑induction cervical maturity using the validated Bishop scoring system. Combines cervical position, consistency, dilation, effacement, and fetal station. Instantly obtain total score, interpretation, and likelihood of successful labor induction.
Developed by Dr. Edward Bishop in 1964, the Bishop score remains the gold‑standard pre‑induction cervical scoring system. It quantifies cervical “ripeness” using five components: position, consistency, dilation, effacement, and fetal station. Higher scores (≥8) strongly correlate with successful vaginal delivery after induction, while low scores (≤5) suggest a higher likelihood of failed induction and increased cesarean risk.
A meta‑analysis by Grobman et al. (2021) including >12,000 inductions confirmed that Bishop score has a significant predictive value for vaginal delivery within 24 hours (area under ROC curve 0.74). Each 1‑point increase raises the likelihood of successful induction by approximately 15–20%. The score also predicts postpartum hemorrhage risk, though it remains one part of a complete clinical picture (parity, gestational age, medical comorbidities).
| Parameter | 0 pts | 1 pt | 2 pts | 3 pts |
|---|---|---|---|---|
| Position | Posterior | Midposition | Anterior | - |
| Consistency | Firm | Moderately firm | Soft | - |
| Dilation | Closed | 1-2 cm | 3-4 cm | ≥5 cm |
| Effacement | 0-30% | 40-50% | 60-70% | ≥80% |
| Station | -3 | -2 | -1 or 0 | +1 or ≥+2 |
A 22‑year‑old nullipara at 41 weeks undergoes cervical exam: posterior position, firm consistency, 1 cm dilated, 40% effacement, station -2. Bishop score = 0+0+1+1+1 = 3 → unfavorable. Clinical decision: administer dinoprostone for cervical ripening before pitocin. Repeat score after 12 hrs: anterior, soft, 3 cm, 70%, station -1 → score 8 → favorable for induction. This interactive tool allows you to simulate such clinical progress.
Even with advances in ultrasound and fetal fibronectin, Bishop score remains inexpensive, quick, and reproducible. It helps avoid unnecessary prolonged inductions, reducing maternal anxiety, health care costs and cesarean section rates. The score is particularly valuable in low‑resource settings where sophisticated biophysical tests are unavailable.