Bishop Score Calculator
Score cervical readiness for labour induction. Select the cervix's dilation, effacement, consistency, and position along with fetal station, and this calculator adds them into a Bishop score (0–13) and flags whether induction is likely to succeed.
Rates and fees change frequently. Always confirm the current figures
with the official authority before relying on this result.
- For clinical reference only — assessment must be performed by a qualified clinician.
Formula
Bishop score = dilation + effacement + station + consistency + position (max 13)
- The Bishop score adds five points-based cervical and fetal findings into a single total from 0 to 13.
- Dilation, effacement, and station each contribute 0–3 points; consistency and position each contribute 0–2.
- A higher score means a more favourable (riper) cervix and a better chance that induction leads to vaginal delivery.
- A score of 8 or more behaves much like spontaneous labour; 5 or less often prompts cervical ripening first.
- Findings must be assessed by a qualified clinician during a vaginal examination; this tool only totals and interprets them.
Favourable cervix
Inputs
- Cervical dilation: 3
- Cervical effacement: 3
- Fetal station: 2
- Cervical consistency: 2
- Cervical position: 2
Dilation 3 + effacement 3 + station 2 + consistency 2 + position 2 = 12 / 13 — a favourable cervix where induction is very likely to succeed.
Frequently asked questions
What is the Bishop score?
It is a pre-labour scoring system that rates how ready the cervix is for induction, based on dilation, effacement, station, consistency, and position.
What score is considered favourable?
Generally a total of 8 or higher suggests a favourable cervix with a good chance of successful induction, while 5 or lower is unfavourable and may call for cervical ripening.
What do the five components mean?
Dilation is how open the cervix is, effacement how thin, station the baby's position relative to the pelvic spines, plus the cervix's consistency (firm to soft) and position (posterior to anterior).
Why does a low score matter?
A low score signals the cervix is not yet ripe, so induction is more likely to be long or to fail. Clinicians may use ripening agents to improve the odds first.
Can I assess this myself?
No. The components require a clinical vaginal examination by a trained provider. This calculator only totals values a clinician supplies.
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