Table 3 Robson classification system for cesarean birth

1

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

2

Nulliparous women with single cephalic pregnancy, ≥ 37 weeks gestation who either had labor induced or were delivered by cesarean section before labor

3

Multiparous women without a previous uterine scar, with single cephalic pregnancy, ≥ 37 weeks gestation in spontaneous labor

4

Multiparous women without a previous uterine scar, with single cephalic pregnancy, ≥ 37 weeks gestation who either had labor induced or were delivered by cesarean section before labor

5

All multiparous women with at least one previous uterine scar, with 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 uterine scars

8

All women with multiple pregnancies, including women with previous uterine scars

9

All women with a single pregnancy with a transverse or oblique lie, including women with previous uterine scars

10

All women with a single cephalic pregnancy < 37 weeks gestation, including women with previous scars