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Table 1 The Robson Classification

From: Cesarean delivery in Iran: a population-based analysis using the Robson classification system

Group

Obstetric Population

1

Nulliparous women with a single cephalic pregnancy, ≥37 weeks gestation in spontaneous labour

2

Nulliparous women with a single cephalic pregnancy, ≥37 weeks gestation who had labour induced or were delivered by CS before labour

2a

Labour induced

2b

Pre-labour CS

3

Multiparous women without a previous CS, with a single cephalic pregnancy, ≥37 weeks gestation in spontaneous labour

4

Multiparous women without a previous CS, with a single cephalic pregnancy, ≥37 weeks gestation who had labour induced or were delivered by CS before labour

4a

Labour induced

4b

Pre-labour CS

5

All multiparous women with at least one previous CS, with a single cephalic pregnancy, ≥37 weeks gestation

6

All nulliparous women with a single breech pregnancy

7

All multiparous women with a single breech pregnancy including women with previous CS(s)

8

All women with multiple pregnancies including women with previous CS(s)

9

All women with a single pregnancy with a transverse or oblique lie, including women with previous CS(s)

10

All women with a single cephalic pregnancy < 37 weeks gestation, including women with previous CS(s)

  1. World Health Organization. Robson Classification: Implementation Manual. 2015