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Bishop Score Calculator

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The Bishop score calculator is here to help pregnant women and their healthcare providers evaluate the readiness of the cervix for labor induction. By looking at different factors like cervix opening and baby's position, it gives you a score. This score helps predict the chances of a successful vaginal delivery, especially if labor needs to be started. 

How to use this Bishop score calculator?

  • Pick the Effacement Range
  • Choose the Cervix Consistency 
  • Select the Fetal Station Type
  • Enter the Head Position
  • Enter the Dilation Size
  • Hit the Calculate button
  • Once you've done that, our Bishop score calculator will instantly display your Bishop score and provide personalized advice based on your specific condition.

What is a Bishop score?

The Bishop score, also known as the Pelvic Score, is a pre-labor scoring system used by healthcare providers to assess a pregnant woman’s cervix. It predicts the likelihood of a successful vaginal delivery, particularly after induction of labor.

This scoring system was developed by Dr. Edward Bishop In 1964, and can be calculated based on five key factors:

  • Cervical dilation: This refers to the opening of the cervix which is measured in centimeters. A higher score indicates more dilation, which is a positive sign for labor.
  • Effacement: This is the thinning of the cervix as it prepares for childbirth. A higher score indicates more effacement, which is a positive sign for labor.
  • Station of the baby's head: This evaluates the position of the baby's head in relation to the cervix within the pelvis. A lower score indicates a more favorable position, as the baby's head is closer to the cervix.
  • Cervical consistency: It evaluates the firmness or softness of the cervix. A higher score indicates a softer cervix, which is a positive sign for labor.
  • Cervical position: This refers to the position of the cervix in relation to the birth canal. A higher score indicates a more favorable position, as the cervix is more open.

Bishop score interpretation

  • A low score (e.g., 1) suggests labor may not occur for about 3 weeks.
  • A high score (e.g., 10) indicates labor could happen within a few days.
  • The score is applicable to both multiparous (those who have given birth before) and nulliparous (first-time mothers) who are being considered for induction.

Chances of Vaginal Delivery:

  • A Bishop score of 8 or higher suggests good chances of a vaginal delivery (favorable cervix).
  • A score of 6 or lower indicates lower chances for vaginal delivery (unfavorable cervix).

Simplified Bishop Score:

  • Using only effacement, station, and dilation can be as predictive as the full score. 
  • A simplified score of 5 is comparable to a full score greater than 8.

Bishop score chart

Have a look at the Bishop score chart below to better understand a scale used to assess the readiness of the cervix for labor.

Bishop Scoring System
Score Dilation (cm) Position of Cervix Effacement (%) Station (-3 to +3) Cervical Consistency
0 Closed Posterior 0-30 -3 Firm
1 1-2 Mid position 40-50 -2 Medium
2 3-4 Anterior 60-70 -1, 0 Soft
3 5-6 - 80+ +1, +2 -

Remember

  • Add up the scores from each category to get your total Bishop score.
  • A higher score generally indicates a more favorable cervix for labor and a higher chance of successful induction.
  • Your healthcare provider will consider the Bishop score along with other factors when making decisions about your labor and delivery.

Disclaimer:

This Bishop score calculator is provided for informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult with qualified healthcare professionals for personalized guidance regarding pregnancy and labor-related decisions. The accuracy of the calculator's results may be influenced by various factors, this tool is meant to support, not replace, the advice of your healthcare professionals. The creators of this tool are not liable for any consequences arising from its use.

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