Calculate the Bishop Score for cervical favorability and labor induction readiness. Assesses dilation, effacement, station, consistency, and position.
The Bishop Score Calculator scores cervical readiness for labor induction using five exam components: dilation, effacement, station, consistency, and position.
Scores range from 0 to 13. Higher scores indicate a cervix that is more favorable for induction, while lower scores suggest that ripening may be needed first. The calculator shows the component breakdown so the total score is easier to interpret in context.
That makes it useful for quickly summarizing how ready the cervix is before an induction decision is made.
The Bishop score is a compact way to turn a cervical exam into a readiness estimate. It helps clinicians compare different exam findings consistently and decide whether the cervix looks favorable enough for induction or whether ripening is more appropriate first.
Bishop Score = Dilation (0-3) + Effacement (0-3) + Station (0-3) + Consistency (0-2) + Position (0-2) Total Range: 0-13 Favorable: ≥ 6 (induction likely to succeed) Unfavorable: < 6 (cervical ripening recommended)
Result: 8/13 — Favorable
A cervix that is 3-4 cm dilated (2), 60-70% effaced (2), at station -2 (1), soft (2), and mid-position (1) scores 8/13, indicating a favorable cervix with high likelihood of successful induction.
The Bishop score is usually used right before an induction decision or at admission for induction. A favorable score suggests a higher chance that induction will proceed smoothly, while an unfavorable score usually points toward cervical ripening first.
The Bishop score summarizes the cervix, but it does not capture every factor that affects induction. Fetal size, maternal history, the reason for induction, and local protocols can all matter as well. The score is one part of the decision, not the whole decision.
Showing the individual components makes it easier to see why the total score is high or low. That is useful when documenting the exam or when comparing changes over time during a ripening process.
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This calculator adds the five classic Bishop examination components: cervical dilation, effacement, station, consistency, and position. The page reports the standard 0-13 total and uses the usual favorable-versus-unfavorable framing to help interpret whether the cervix appears more or less ready for induction.
The result is a structured summary of the cervical exam, not a guarantee of vaginal delivery or induction success. Parity, indication for induction, gestational age, fetal size, and the chosen ripening method all affect real outcomes, so the score should be used alongside the full obstetric picture.
A score of ≥6 is generally considered favorable for oxytocin induction. However, induction can be performed at any Bishop score when medically indicated — lower scores simply have higher rates of prolonged labor and cesarean delivery.
Options include prostaglandin E2 (dinoprostone), prostaglandin E1 (misoprostol), and mechanical methods (Foley catheter balloon, Cook cervical ripening balloon). Choice depends on clinical factors, contraindications, and institutional protocols.
The Bishop score has moderate predictive value for cesarean delivery. Low scores are associated with higher cesarean rates (approaching 50% for scores 0-3), while favorable scores have cesarean rates similar to spontaneous labor onset (10-15%).
Yes. Multiparous women generally have higher success rates at any given Bishop score compared to nulliparous women. Some clinicians use different thresholds for nulliparous (≥8) and multiparous (≥6) patients.
Cervical length by ultrasound has been studied as an adjunct or alternative to the Bishop score. Cervical length <25-30mm correlates with favorable induction outcomes. However, the digital exam remains standard practice.
The Bishop score should be assessed immediately before the decision to induce or upon admission for induction. Cervical status can change rapidly, so assessments performed days before may not reflect current conditions.