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Bishop's score

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

This is a method of expressing the factors relating to the ease of induction or how readily the patient will go into labour after induction.

Pelvic

Score

Cervical feature

0

1

2

3

Dilation of

0cm

1-2cm

3-4cm

5-6cm

Effacement (%)

0-30

40-60

60-70

80+

Station of presenting part (relative to the ischial spines)

-3cm

-2cm

-1/0cm

+1/+2cm

Consistency of

firm

medium

soft

-

Position of cervix

posterior

mid -position

anterior

-

Interpretation:

Total score:

0-5 unfavourable

>5 favourable

The modified Bishop scoring system (Calder score) is presented below:

Pelvic

Score

Cervical feature

0

1

2

3

Dilation of

<1cm

1-2cm

2-4cm

>4cm

Length of

4cm

2-4cm

1-2cm

<1cm

Station of presenting part (relative to the ischial spines)

-3cm

-2cm

-1/0cm

+1/+2cm

Consistency of

firm

average

soft

-

Position of cervix

posterior

mid;anterior

-

-

 

Reference:

  1. Bishop EH. Pelvic scoring for elective induction. Obstet Gynecol, 2, 1964, 24, 266-268
  2. Calder AA, Embrey MP, and Hillier K. Exta-amniotic prostaglandin E2 for the induction of labour at term. Journal of Obstetrics & Gynaecology of the British Commonwealth., 1, 1974, 81, 39-46.

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