Free Bishop Score Calculator

The Free Bishop Score Calculator is an online cervical assessment tool designed to evaluate a pregnant individual's readiness for labor and predict the success of labor induction. It is widely recognized as a Pregnancy Bishop Score Online resource for labor induction assessment and cervical scoring. By assigning points to five specific clinical factors, this calculator produces a numerical score that helps guide decisions regarding induction. This scoring system, often referred to as the Bishop Score for Induction, is a standard method used in obstetrics to assess cervical favorability.

Understanding the Bishop Score

Originally developed by Dr. Edward Bishop in the 1960s, the Bishop score provides a structured way to determine cervical ripeness. The score combines three cervical characteristics—dilation, effacement, and consistency—with two fetal parameters: station (the descent of the baby’s head) and position (the orientation of the baby within the pelvis). Each factor is assigned points, and the total score, which ranges from 0 to 13, indicates the likelihood of successful vaginal delivery if induction is undertaken.

Common Reasons for Labor Induction

Induction of labor may be recommended for several medical reasons:

• Pregnancy that continues beyond 42 weeks (post-term).
• Conditions such as preeclampsia, gestational diabetes, or hypertension that endanger maternal or fetal health.
• Intrauterine growth restriction (IUGR) where the baby is not growing adequately.
• Premature rupture of membranes without the onset of spontaneous labor.
• Certain maternal health concerns that make continuing the pregnancy risky.

Induction is generally considered only after 36 weeks of pregnancy, as babies born earlier may face complications. Women who have given birth before often experience more predictable responses to induction.

The Five Scoring Factors

Each factor in the Bishop score is evaluated during a pelvic exam:

Cervical Dilation – Measures how far the cervix has opened, from closed (0 cm) to fully dilated (10 cm). Scoring:

• 0 cm = 0 points
• 1–2 cm = 1 point
• 3–4 cm = 2 points
• ≥5 cm = 3 points

Cervical Effacement – Refers to the thinning of the cervix, expressed as a percentage. Scoring:

• 0–30% = 0 points
• 40–50% = 1 point
• 60–70% = 2 points
• ≥80% = 3 points

Cervical Consistency – Describes the texture of the cervix. Scoring:

• Firm = 0 points
• Moderately firm = 1 point
• Soft = 2 points

Fetal Station – Indicates the position of the baby’s head relative to the ischial spines (scale −3 to +3). Scoring:

• −3 = 0 points
• −2 = 1 point
• −1 or 0 = 2 points
• +1 or +2 = 3 points

Fetal Position – The orientation of the baby’s face within the uterus. Scoring:

• Posterior (face toward mother’s front) = 0 points
• Mid (face toward mother’s side) = 1 point
• Anterior (face toward mother’s back) = 2 points

Interpreting the Bishop Score

The total score is categorized as follows:

• Score ≤ 6: Unfavorable cervix. The likelihood of successful vaginal delivery after induction is low; cervical ripening may be required.
• Score 7: Borderline; additional clinical assessment is needed.
• Score ≥ 8: Favorable cervix. The probability of a successful induction is similar to that of spontaneous labor.

This interpretation is a key part of the Bishop Score Interpretation and helps guide clinical decisions.

Using the Calculator in Practice

To use the Bishop Score Calculator, enter the results of a pelvic examination for each of the five factors. The tool automatically sums the points and displays the total score along with an interpretation. For example, a woman at 39 weeks with a dilation of 5 cm (3 points), effacement of 70% (2 points), moderately firm cervix (1 point), fetal station −1 (2 points), and anterior position (2 points) would receive a total of 10 points—indicating a cervix very favorable for induction.

This cervical scoring tool is intended for educational purposes and should not replace a complete evaluation by a qualified healthcare professional. Always discuss your results with your doctor or midwife.