Results: In 87 cases of PPH with blood transfusion at Nam Dinh Hospital for Obstetrics and Gynecologyfrom January 1, 2020 to the end of June 30, 2021, 64.4% of PPH due to "uterine atony" and accounted for 84% of the causes of PPH inthe vaginal delivery group; "placenta previa" accounted for 24.1%; "placental abruption" is 5.7%; 4.6% due to "genital tract trauma" and "placenta accreta" accounted for the smallest rate of 1.1%.