Select the scoring system you want to use.

Original Bishop score = cervical dilation + cervical effacement + fetal station + cervical consistency + cervical position, for a total range of 0 to 13.

Component	0 points	1 point	2 points	3 points
Cervical dilation	<1 cm	1–2 cm	3–4 cm	≥5 cm
Cervical effacement	0–30%	40–50%	60–70%	≥80%
Fetal station	-3	-2	-1 or 0	+1 or +2
Cervical consistency	Firm	Moderately firm	Soft	-
Cervical position	Posterior	Mid-position	Anterior	-

Modified Bishop score = doubled cervical-dilation score + cervical length + fetal station + cervical consistency + cervical position + clinical modifiers.

Component	0 points	1 point	2 points	3 points
Cervical dilation	<1 cm	1–2 cm	3–4 cm	≥5 cm
Cervical length	>2.5 cm	>1.5 to 2.5 cm	>0.5 to 1.5 cm	≤0.5 cm
Fetal station	-3	-2	-1 or 0	+1 or +2
Cervical consistency	Firm	Moderately firm	Soft	-
Cervical position	Posterior	Mid-position	Anterior	-

Modified score modifiers: add 1 point for pre-eclampsia and for each prior vaginal delivery; subtract 1 point for postdate pregnancy, nulliparity and PPROM.

Bishop Score for Vaginal Delivery and Induction of Labour