Prevalence of PPH ≥500 ml.

1From test of heterogeneity.2Where studies presented PPH prevalence by parity or gestation the data set was disaggregated into two data sets and consequently the total number of data sets is higher for parity and gestation that the total number for the overall estimate.3In one of the studies which stratified PPH prevalence by parity there was some information missing for parity for some of the women and so they were excluded from this analysis; consequently the total number of women giving birth for the parity analysis is slightly lower than the women used in the overall analysis.