Bishop Score

Assesses cervical readiness for labor induction.

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Parameters

Cervical Dilation (cm)*

Closed (0 points)

1 - 2 cm (1 point)

3 - 4 cm (2 points)

≥ 5 cm (3 points)

Cervical Effacement (%)*

0 - 30% (0 points)

40 - 50% (1 point)

60 - 70% (2 points)

≥ 80% (3 points)

Fetal Station*

-3 (0 points)

-2 (1 point)

-1, 0 (2 points)

+1, +2 (3 points)

Cervical Consistency*

Firm (0 points)

Medium (1 point)

Soft (2 points)

Cervical Position*

Posterior (0 points)

Midposition (1 point)

Anterior (2 points)

Bishop Score Result

FormulaSum of points from Dilation (0-3), Effacement (0-3), Station (0-3), Consistency (0-2), and Position (0-2).

Clinical Pearls

A cornerstone of obstetrical triage to guide the method of labor induction.

Limitations

Subject to inter-observer variability on cervical exam. Less predictive of induction success in multiparous women compared to nulliparous women.

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