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Table 2 Obstetric characteristics of women included in each of the 10 groups.

From: WHO Global Survey on Maternal and Perinatal Health in Latin America: classifying caesarean sections

Group

Women included

1

Nulliparous with single cephalic pregnancy,

≥37 wks gestation in spontaneous labour

2*

Nulliparous with single cephalic pregnancy,

≥37 wks gestation who either had labour

induced or were delivered by CS before labour

3

Multiparous without a previous uterine scar,

with single cephalic pregnancy,

≥37 wks gestation in spontaneous labour

4*

Multiparous without a previous uterine scar,

with single cephalic pregnancy,

≥37 wks gestation who either had labour

induced or were delivered by CS before labour

5

All multiparous with at least one previous

uterine scar, with single cephalic

pregnancy, ≥37 wks 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 ≤36 wks gestation,

including women with previous scars

  1. * Often divided into 2a and 4a (inductions) and 2b and 4b (pre-labour CS)