Bishop score
Bishop score, also Bishop's score, is a pre-labour scoring system to assist in predicting whether induction of labour will be required.[1]
Components
The total score is achieved by assessing the following five components on vaginal examination:
- Cervical dilatation
- Cervical effacement
- Cervical consistency
- Cervical position
- Fetal station
They can be remembered with the mnemonic: Call PEDS For Parturition = Cervical Postion, Effacement, Dilation, Softness; Fetal Station.
Scoring
Each components is given a score of 0-2 or 0-3. The highest possible score is 13.
Bishop score
| Parameter\Score |
0 |
1 |
2 |
3 |
| Position |
Posterior |
Intermediate |
Anterior |
- |
| Consistency |
Firm |
Intermediate |
Soft |
- |
| Effacement |
0-30% |
40-50% |
60-70% |
80% |
| Dilation |
<1 cm |
1-2 cm |
2-3 cm |
>3 cm |
| Fetal station |
-3 |
-2 |
-1, 0 |
+1, +2 |
Interpretation
A score of 5 or less suggests that labour is unlikely to start without induction. A score of 9 or more indicates that labour will most likely commence spontaneously.[2]
A low Bishop's score often indicates that induction is unlikely to be successful[3]. Some sources indicate that only a score of 8 or greater is reliably predictive of a successful induction.
Modified Bishop score
According to the Modified Bishop's pre-induction cervical scoring system, effacement has been replaced by cervical length in cm, with scores as follows- 0>3cm, 1>2cm, 2>1cm, 3>0cm.[4]
References
- ^ Bishop EH. 1964. Pelvic scoring for elective induction. Obstetrics and Gynecology 24:266.
- ^ Tenore J (2003). "Methods for cervical ripening and induction of labor". Am Fam Physician 67 (10): 2123-8. PMID 12776961. (Incomplete) Free Text.
- ^ http://cat.inist.fr/?aModele=afficheN&cpsidt=2381313
- ^ Dutta DC. Text Book of Obstetrics. 6ed. New Central Book Agency. 2001. ISBN 978-8173811425.
See also
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