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Bishop's Score

Extracted from Survival Guide to Midwifery, 2nd Edition (2012) Diane M. Fraser and Margaret A. Cooper, Oxford; Churchill Livingstone: 2012. Courtesy Elsevier

Rating system to assess the suitability of the cervix for induction of labour (IOL).


Modified Bishop's pre-induction pelvic scoring systems
Inducibility feature Inducibility feature 0 1 2 3
Dilatation of cervix in cm <1 1-2 2-4 >4
Consistency of cervix Firm Firm Medium Soft
Cervical canal length in cm >4 2-4 1-2 <1
Position of cervix Posterior Mid Anterior -
Position of presenting part in cm above or below ischial spine -3 -2 -1 +1, +2

A score of 8 or more denotes a ripe cervix that is amenable to IOL. Note, a vaginal examination to assess the cervix is a subjective examination and may be subject to inter-observer variation.

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