Robson’s group

Number of cesarean sections

Rates of cesarean sections (%)

CHRACERH

N = 90

YCH

N = 462

CHRACERH

YCH

1

14

100

15.6

21.6

2

12

50

13.3

10.8

3

18

104

20

22.5

4

6

30

6.7

6.5

5

28

80

31.1

17.3

6

0

10

0

2.2

7

4

26

4.4

5.6

8

2

30

2.2

6.5

9

4

8

4.4

1.7

10

2

24

2.2

5.2