CD24 and pulmonary arterial hypertension: Amongst studies specifically evaluating predictors for severe PPH after CD24,26–28, previous CS scar26,27, antepartum hemorrhage24,27, multiple pregnancies23,28, preeclampsia3, general anesthesia23,24,28, antepartum anemia27,28 and maternal age ≥ 35 years3 are reported as potential predictors; however, PPH may also occur in some women with no known risk factors4.