Meta-analysis for fibrinogen level and its association with severe PPH/PPH. (A) Forest plot of the MD with a 95% CI for predelivery fibrinogen concentration between women with severe PPH and controls. (B) Forest plot of the MD with a 95% CI for predelivery fibrinogen concentration between women with severe PPH (WHO definition only) and controls. (C) Forest plot of the MD with a 95% CI for predelivery fibrinogen concentration between women with PPH and controls. (D) Forest plot of the MD with a 95% CI for predelivery fibrinogen concentration between women with PPH (WHO definition only) and controls.