Table 1.

The Robson’s Grouping system for caesarean deliveries.

Robson 1 (R1)	Nullipar, single cephalic, ≥37 weeks, spontaneous labour
Robson 2 (R2)	Nullipar, single cephalic, ≥37 weeks, induced
Robson 3 (R3)	Multipar (excluding previous caesareans), single cephalic, ≥37 weeks, spontaneous labour
Robson 4 (R4)	Multipar (excluding previous caesareans), single cephalic, ≥37 weeks, induced
Robson 5 (R5)	Previous caesarean, single cephalic ≥37 weeks
Robson 6 (R6)	All nullipar breeches
Robson 7 (R7)	All multipar breeches (including previous caesareans)
Robson 8 (R8)	All multiple pregnancies (including previous caesareans)
Robson 9 (R9)	All abnormal lies (including previous caesareans)
Robson 10 (R10)	All single cephalic, ≤36 weeks (including previous caesareans)