Odour

Fetid

11

5.2

Non fetid

202

94.8

Chronology

AF initially clear

50

23.5

AF stained at start

163

76.5

Moment of detection

Before labour

4

1.9

Latent phase

17

8

Active phase

136

63.8

Expulsion phase

9

4.2

Per operative

47

22.1