Table 1.

Description of original Robson criteria and the modified Robson criteria

Group	M. Robson ten group	The modified Robson
1.	Nulliparous women with single cephalic pregnancy, at ≥37 weeks gestation in spontaneous labour	Nullipara, singleton cephalic, ≥37 weeks, spontaneous labour
2.	Nulliparous women with single cephalic pregnancy, ≥37 weeks gestation, who either had labour induced or were delivered by caesarean section before labour	Nullipara, singleton cephalic, ≥37 weeks,  A: Induced  B: Caesarean section before labour
3.	Multiparous women, without a previous uterine scar with single cephalic pregnancy, ≥37 weeks gestation in spontaneous labour	Multipara, singleton cephalic, ≥37 weeks, spontaneous labour
4.	Multiparous women, without a previous uterine scar with single cephalic pregnancy, ≥37 weeks gestation who either had labour induced or were delivered by caesarean section before labour	Multipara, singleton cephalic, ≥37 weeks,  A: Induced  B: Caesarean section before labour
5.	All multiparous women, with at least one previous uterine scar and a single cephalic pregnancy ≥37 weeks gestation	Previous caesarean section, Singleton cephalic, ≥37 weeks  A: Spontaneous labour  B: Induced labour  C: Caesarean section before labour
6.	All nulliparous women with a single breech pregnancy	All nulliparous breeches  A: Spontaneous labour  B: Induced labour  C: Caesarean section before labour
7.	All multiparous women with a single breech pregnancy including, women with previous uterine scars	All multiparous breeches (including previous caesarean section)  A: Spontaneous labour  B: Induced labour  C: Caesarean section before labour
8.	All women with multiple pregnancies, including women with previous uterine scars	All multiple pregnancies (including previous caesarean section)  A: Spontaneous labour  B: Induced labour  C: Caesarean section before labour
9.	All women with a single pregnancy with a transverse or oblique lie, including women with previous uterine scars	All abnormal lies (including previous caesarean section but excluding breech)  A: Spontaneous labour  B: Induced labour  C: Caesarean section before labour
10.	All women with single cephalic pregnancy at less than or equal to 36 weeks gestation, including women with previous scars	All singleton cephalic, ≤36 weeks (including previous caesarean section)  A: Spontaneous labour  B: Induced labour  C: Caesarean section before labour