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Robson 10-group classification
Standard way to compare caesarean rates.
Source: WHO 2017Group
| 1 | Nullip, single cephalic, ≥37 wk, spontaneous labour. |
|---|---|
| 2 | Nullip, single cephalic, ≥37 wk, induced (2a) or CS before labour (2b). |
| 3 | Multip, no previous CS, single cephalic, ≥37 wk, spontaneous. |
| 4 | Multip, no previous CS, single cephalic, ≥37 wk, induced (4a) / pre-labour CS (4b). |
| 5 | Previous CS, single cephalic, ≥37 wk. |
| 6 | All nulliparous breech. |
| 7 | All multiparous breech. |
| 8 | All multiple pregnancies. |
| 9 | All transverse / oblique lie. |
| 10 | All single cephalic ≤36 weeks. |
A summary for trained clinicians. Always check the full guideline, the patient in front of you and your hospital's protocol. Spotted an error? Tell us.