GROUPE DE ROBSON

Total delivery

n = 2154

Césariennes VEM

n = 835

A

Frequency

B

Relative contribution of each group to the overall rate of cesarean section

Rate of cesarean section in each group

Number

(A/Total delivery) × 100

Number

(B/Total cesarean) × 100

(B/A) × 100

1

Nullipara, single pregnancy, cephalic presentation, gestational age ≥37 SA, spontaneous labor

561

26%

136

16.3%

24.2%

2

Nullipara, single pregnancy, cephalic presentation, gestational age ≥37 SA, onset of labor or cesarean section before labor

91

4.2%

87

10.4%

95.6%

3

Multipara, single pregnancy, cephalic presentation, gestational age ≥37 SA, spontaneous labor, without cicatricial uterus

720

33.4%

133

15.9%

18,5%

4

Multipara, single pregnancy, cephalic presentation, gestational age ≥37 SA, onset of labor or caesarean before work, without cicatricial uterus

101

4.7%

97

11,6%

96%

5

Previous cesarean section all multipara with at least a uterine scar, single pregnancy, cephalic presentation, gestational age ≥37 SA

275

12.8%

180

21.6%

65.5%

6

All nullipara, single pregnancy, seat presentation

33

1.5%

30

3.6%

90.9%

7

All multipara, single pregnancy seat presentation, cicatricial uterus included

73

3.4%

59

7,1%

80.8%

8

All multiple pregnancies, cicatricial uterus included

78

3.6%

40

4.8%

51.3%

9

All single pregnancies with transversal presentation, cicatricial uterus included

8

0.4%

8

1%

100%

10

All single pregnancies with cephalic presentation, gestational age <37 SA, cicatricial uterus included

214

9.9%

65

7.8%

30.4%

Total

2154

100%

835

100%

38.8%