Table 1

The Robson Ten Group Classification System

GroupDescription
1Nulliparous, singleton, cephalic, full-term, spontaneous labour.
2Nulliparous, singleton, cephalic, full-term, induced labour or prelabour caesarean section.
3Multiparous, singleton, cephalic, full-term, without a previous caesarean section, spontaneous labour.
4Multiparous, singleton, cephalic, full-term, without a previous uterine scar, induced labour or prelabour caesarean section.
5Multiparous, singleton, cephalic, full-term, with a previous caesarean section.
6Nulliparous, singleton, breech.
7Multiparous, singleton, breech.
8Multiple pregnancy (twins or higher-order multiples).
9Singleton, transverse or oblique lie.
10Singleton, cephalic, preterm.