Bishop Score Calculator
Score cervical readiness for labour induction — dilation, effacement, station, consistency and position — with the modified Bishop score and what it implies for induction.
How it works
Score = dilation (0–3) + effacement (0–3) + station (0–3) + consistency (0–2) + position (0–2); maximum 13
The Bishop score, from a 1964 paper, grades how ready the cervix is for labour. A score of 8 or more predicts a vaginal delivery after induction about as likely as after spontaneous labour; 5 or below usually means the cervix needs ripening first. Some units add a point for each previous vaginal birth and subtract for post-dates or complications (the modified score). It is a guide to the method of induction, not a decision about whether to induce.
Worked example
1–2 cm, 40–50% effaced, station −2, medium, mid-position = 5: unfavourable, so ripening would come first.
Frequently asked questions
What score is “favourable”?
Most guidelines use 8 or more (some 6 or more) as favourable for oxytocin or amniotomy alone.
Does a low score mean induction will fail?
No — it means it will take longer and more often needs ripening. Many low-score inductions still deliver vaginally.
Related calculators
Educational estimate only — your midwife, doctor or paediatrician will confirm dates and advice for your pregnancy or baby.