Conclusions
Atonic postpartum hemorrhage and severe atonic postpartum
hemorrhage rates continued to increase in British
Columbia across a range of maternal, fetal and
obstetric characteristics. The 46% increase in atonic
postpartum hemorrhage with blood transfusion between
2000 and 2009 is substantial. Given that these increases
were similar to findings from various countries and jurisdictions
employing different definitions and distinct
markers of severity, further research is required to identify
and address the cause or causes of the increase in
atonic postpartum hemorrhage