Stages of Labour

placebo group

n = 64

HBB group

n = 59

P-value

First stage (minutes)

269.3 ± 135.9

279.1 ± 134.0

0.691

Second stage (minutes)

34.1 ± 18.2

33.6 ± 18.1

0.886

First + Second stage (minutes)

305.3 ± 148.9

312.5 ± 146.9

0.788