Vulnerability to postpartum hemorrhage?

Some women are at more risk for postpartum hemorrhage as compared to others. Some risk factors of postpartum hemorrhage are: Placental abruption, placenta previa, overdistended uterus, high blood pressure disorder pregnancy, multiple baby pregnancy, having previous births, prolonged labor, use of forcep assisted delivery, infection and obesity. 

Question: Are women with asian background more susceptible to postpartum hemorrhage?

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