1 Nulliparous, singleton, cephalic, >37w, in spontaneous labour
2 Nulliparous, singleton, cephalic, >37w, induce labour or CS before labour
2a Nulliparous, singleton, cephalic, >37w, induce labour
2b Nulliparous, singleton, cephalic, >37w, CS before labour
3 Multiparous (excluding previous CS), singleton, cephalic, >37w, in spontaneous labour
4 Multiparous (excluding previous CS), singleton, cephalic, >37w, induce labour or CS before labour
4a Multiparous (excluding previous CS), singleton, cephalic, >37w, induce labour
4b Multiparous (excluding previous CS), singleton, cephalic, >37w, CS before labour
5 Previous CS, singleton, cephalic, >37w
6 All nulliparous with a single breech
7 All multiparous with a single breech (including previous CS)
8 All multiple pregnancies (including previous CS)
9 All women with a single pregnancy in transverse or oblique lie (including previous CS)
10 All singleton, cephalic, <37w (including previous CS)