Postpartum HemorrhagePostpartum Hemorrhage: Epidemiology, Risk Factors, and CausesOYELESE, YINKA MD*; ANANTH, CANDE V. PHD, MPH†Author Information *Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Tennessee Institute of Fetal Maternal and Infant Health, University of Tennessee Health Sciences Center, Memphis, TN †Division of Epidemiology and Biostatistics, Department of Obstetrics, Gynecology, and Reproductive Sciences, UMDNJ-Robert Wood Johnson Medical School, New Brunswick, New Jersey Correspondence: Yinka Oyelese, MD, Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Tennessee Institute of Fetal Maternal and Infant Health, 853 Jefferson Ave, Suite E102, University of Tennessee Health Sciences Center, Memphis, TN. E-mail: firstname.lastname@example.org, Bob.email@example.com Clinical Obstetrics and Gynecology: March 2010 - Volume 53 - Issue 1 - p 147-156 doi: 10.1097/GRF.0b013e3181cc406d Buy Metrics Abstract Postpartum hemorrhage (PPH) is a leading cause of death and morbidity relating to pregnancy. Uterine atony is the leading cause of PPH, and trauma, including iatrogenic trauma, increases the risk for postpartum hemorrhage. Women with PPH in a pregnancy are at increased risk of PPH in a subsequent pregnancy. Awareness of these facts, and anticipation and prevention of uterine atony, as well as avoiding unnecessary cesareans, episiotomies, and other genital tract trauma have the potential to significantly reduce the mortality and morbidity from postpartum hemorrhage. The epidemiology of postpartum hemorrhage, including the incidence and temporal trends as well as the causes and risk factors associated with it are presented. © 2010 Lippincott Williams & Wilkins, Inc.