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Table 1. Robson’ 10-Group Classification.

No. Groups
1 Nulliparous, single cephalic, >37 wks in spontaneous labor
2 Nulliparous, single cephalic, >37 wks, induced or CS before labor
3 Multiparous (excluding previous CS), single cephalic, >37 weeks in spontaneous labor
4 Multiparous (excluding previous CS), single cephalic, >37 weeks, induced or CS before labor
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 wks (including previous CS)