What is the Bishop Score?

The Bishop Score, also known as the cervical score, is a system used to assess the readiness of the cervix for induction of labor. It helps predict the likelihood of successful vaginal delivery after induction.

Original Bishop Score Scoring System:

• Dilation (cm):
  • 0 cm: 0 points
  • 1-2 cm: 1 point
  • 3-4 cm: 2 points
  • 5+ cm: 3 points
• Effacement (%):
  • 0-30%: 0 points
  • 40-50%: 1 point
  • 60-70%: 2 points
  • 80+%: 3 points
• Station (cm): (Refers to the position of the baby's head relative to the ischial spines)
  • -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

Modified Bishop Score Scoring System:

The Modified Bishop Score typically excludes Cervical Consistency and Cervical Position. The maximum score is 9.

• Dilation (cm): Same as Original
• Effacement (%): Same as Original
• Station (cm): Same as Original
• Cervical Consistency: Not typically included (0 points)
• Cervical Position: Not typically included (0 points)

Interpretation of Total Score (Original Bishop Score):

• Score 0-5: Unfavorable cervix. Induction of labor is less likely to be successful and may require cervical ripening methods.
• Score 6-8: Favorable cervix. Induction of labor is often successful, especially for first-time mothers.
• Score 9-13: Very favorable cervix. High likelihood of successful induction and vaginal delivery.

Interpretation of Total Score (Modified Bishop Score):

• Score 0-4: Unfavorable cervix. Induction of labor is less likely to be successful.
• Score 5-9: Favorable cervix. Induction of labor is often successful.