Background: Postpartum hemorrhage (PPH) continues to be a significant global burden leading to high maternal mortality and morbidity rates. Uterine atony is the most prevalent cause of postpartum hemorrhage, accounting for 75% to 90% of cases.
 Aim: Research uterine atony related PPH at Hospital of Hue University of Medicine and Pharmacy’s Department of Obstetrics and Gynecology.
 Materials and methods: In this study, we conducted a retrospective case-control study to determine the risk factors for PPH among a cohort of women who gave birth between August 2020 and June 2021 at the Department of Obstetrics and Gynecology, Hue University of Medicine and Pharmacy Hospital. PPH was defined as an estimated blood loss ≥500 mL. Logistic regression analysis was used to identify independent risk factors for PPH.
 Results: After the vaginal deliveries, we collected data from 147 patients, including 49 women with PPH caused by uterine atony and 98 without PPH. Maternal characteristics significantly associated with PPH included: pre-delivery anemia (adjusted OR [aOR] 4.0, 95% Confidence interval [CI]: 1.7 - 11.2), macrosomia (aOR = 4.3; 95%CI 1.1 - 16.8) and grand parity (aOR = 4.7; 95%CI: 1.7 - 13.9).
 Conclusions: All pregnant women should have their risks associated with postpartum hemorrhage evaluated and monitored during their pregnancies’ prenatal, labor, and postpartum stages.
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