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Bishop Score (Cervical Favorability)

Obstetrics & Gynecology

Medical context

Assess cervical favorability for labor induction using the Bishop score.

Obstetric teams pair dating and labor scores with ultrasound data and institutional obstetric pathways.

This page explains the Bishop formula, how to interpret the output, known limitations, and peer-reviewed references so you can verify results against primary sources and local protocols.

It is grouped under Obstetrics & Gynecology because pregnancy dating, labor scores, and perinatal tools.

How to use this calculator

  1. Enter the values requested by the Bishop calculator using the units shown beside each field.
  2. Review the calculated result and read the interpretation section before acting on the output.
  3. Check limitations and references if the result will change management, dosing, or disposition.
  4. Use the related calculators section when you need supporting values (for example electrolytes, weight, or complementary risk scores).

Calculator

Result

0

Unfavorable cervix

Educational use only. Confirm results with clinical judgment, primary sources, and local protocols. Not a substitute for professional medical advice. Full disclaimer.

Formula

Dilation, effacement, station, consistency, and position scored and summed.

Interpretation

Higher scores (≥8) favor successful vaginal delivery after induction; low scores suggest unfavorable cervix.

Limitations

Modified Bishop variants exist; clinical context and parity matter.

Frequently asked questions

What is a favorable Bishop score?
Often ≥8 is considered favorable; 6–7 intermediate.
Is the Bishop result enough to make a treatment decision?
No. Calculators support medical decision-making but do not replace examination, shared decision-making, institutional protocols, or consultant input when stakes are high.
Does Calcmedical store the values I type in?
Inputs are processed in your browser for this session. We do not ask for patient names or medical record numbers. See our privacy policy for hosting and analytics details.

References

  • Bishop EH. Pelvic scoring for elective induction