Table 1 Ten-group classification according to Robson

1.

Nulliparous, single cephalic, > 37 weeks, in spontaneous labour

2.

Nulliparous, single cephalic, > 37 weeks, induced or CS before labour

3.

Multiparous (excluding previous CS), single cephalic, > 37 weeks, in spontaneous labour

4.

Multiparous (excluding previous CS), single cephalic, > 37 weeks, induced or CS before labour

5.

Previous CS, single cephalic, > 37 weeks

6.

All nulliparous breeches

7.

All multiparous breeches (including previous CS)

8.

All multiple pregnancies (including previous CS)

9.

All abnormal lies (including previous CS)

10.

All single cephalic, < 36 weeks, (including previous CS)