# Bishop Score Calculator

Calculate the Bishop Score to assess cervical readiness for labor induction. Enter dilation, effacement, station, consistency, and position to get the score (0-13).

## What this calculates

Calculate the Bishop Score to assess whether the cervix is ready for labor induction. This scoring system evaluates five cervical characteristics on a 0-13 point scale. A score of 8 or higher indicates a favorable cervix with a high likelihood of successful induction.

## Inputs

- **Cervical Dilation** — options: Closed (0 cm) -- Score 0, 1-2 cm -- Score 1, 3-4 cm -- Score 2, 5+ cm -- Score 3
- **Cervical Effacement** — options: 0-30% -- Score 0, 40-50% -- Score 1, 60-70% -- Score 2, 80%+ -- Score 3
- **Fetal Station** — options: -3 -- Score 0, -2 -- Score 1, -1 or 0 -- Score 2, +1 or +2 -- Score 3
- **Cervical Consistency** — options: Firm -- Score 0, Medium -- Score 1, Soft -- Score 2
- **Cervical Position** — options: Posterior -- Score 0, Mid-position -- Score 1, Anterior -- Score 2

## Outputs

- **Bishop Score** — Total Bishop Score (0-13)
- **Cervical Favorability** — formatted as text — Whether the cervix is favorable for induction
- **Induction Success Likelihood** — formatted as text — Estimated likelihood of successful vaginal delivery with induction
- **Clinical Implication** — formatted as text — General clinical guidance based on the score

## Details

The Bishop Score was developed by Dr. Edward Bishop in 1964 and remains the standard method for assessing cervical readiness for induction of labor. It evaluates five factors, each scored on a scale:

**Scoring breakdown:**
- **Dilation:** 0 points (closed), 1 (1-2 cm), 2 (3-4 cm), 3 (5+ cm)
- **Effacement:** 0 points (0-30%), 1 (40-50%), 2 (60-70%), 3 (80%+)
- **Station:** 0 points (-3), 1 (-2), 2 (-1 or 0), 3 (+1 or +2)
- **Consistency:** 0 points (firm), 1 (medium), 2 (soft)
- **Position:** 0 points (posterior), 1 (mid), 2 (anterior)

A total score of 8 or more is considered "favorable" and suggests that induction will likely result in a successful vaginal delivery, comparable in success rate to spontaneous labor. Scores below 6 indicate an "unfavorable" cervix, where cervical ripening agents (such as prostaglandins or a Foley catheter balloon) are typically recommended before starting oxytocin.

For first-time mothers (nulliparous women), a higher Bishop Score is generally needed for the same success rate compared to women who have given birth before (multiparous). Some modified versions of the Bishop Score include additional factors like prior vaginal deliveries.

This tool is for educational purposes only and should not replace professional medical advice.

## Frequently Asked Questions

**Q: What is a good Bishop Score for induction?**

A: A Bishop Score of 8 or higher is considered favorable for induction, meaning the cervix is ripe and induction is likely to succeed. Scores of 6-7 are moderately favorable. Scores below 6 are unfavorable, and cervical ripening is usually recommended before starting oxytocin. For first-time mothers, a score of 9+ gives the best chance of successful vaginal delivery.

**Q: How is the Bishop Score measured?**

A: The Bishop Score is assessed during a cervical exam (digital vaginal examination) by a healthcare provider. The provider evaluates how dilated the cervix is, how thin it has become (effacement), how far the baby's head has descended (station), whether the cervix feels firm or soft (consistency), and whether it points toward the back or front (position). The exam takes about 30-60 seconds.

**Q: Can the Bishop Score change quickly?**

A: Yes. The Bishop Score can change significantly in a matter of hours, especially in late pregnancy. Cervical ripening agents like prostaglandins or a Foley catheter balloon can improve the score by 2-4 points over 12-24 hours. Natural changes in the final days of pregnancy can also shift the score. It is typically reassessed before starting an induction to ensure the most current reading.

**Q: What happens if my Bishop Score is low and I need to be induced?**

A: If the Bishop Score is below 6 and induction is medically necessary, cervical ripening is performed first. This may involve prostaglandin medications (misoprostol or dinoprostone) inserted vaginally, or mechanical methods like a Foley catheter balloon. These methods soften and dilate the cervix over 12-24 hours before oxytocin (Pitocin) is started. This two-step approach significantly improves the chance of successful vaginal delivery.

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Source: https://vastcalc.com/calculators/health/bishop-score
Category: Health & Fitness
Last updated: 2026-04-08