Bishop's score
Last reviewed 11/2021
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:
- Bishop EH. Pelvic scoring for elective induction. Obstet Gynecol, 2, 1964, 24, 266-268
- 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.