RT Book, Section A1 Dooley-Hash, Suzanne A1 Knoop, Kevin J. A2 Knoop, Kevin J. A2 Stack, Lawrence B. A2 Storrow, Alan B. A2 Thurman, R. Jason SR Print(0) ID 1181041739 T1 Third-Trimester Blunt Abdominal Trauma T2 The Atlas of Emergency Medicine, 5e YR 2021 FD 2021 PB McGraw-Hill PP New York, NY SN 9781260134940 LK accessemergencymedicine.mhmedical.com/content.aspx?aid=1181041739 RD 2024/04/23 AB Trauma is a major cause of maternal and fetal mortality. In addition to injuries to abdominal organs seen in nonpregnant patients, preterm labor, fetal-maternal hemorrhage, uterine rupture, and, most importantly, abruptio placentae may result from blunt trauma during pregnancy. Abruptio placentae, the premature separation of the placenta from the site of uterine implantation, is found in up to 50% of major blunt trauma patients and up to 5% of those with apparent minor injuries. Signs of uterine hyperactivity and fetal distress are commonly seen when significant placental detachment occurs. Most patients have vaginal bleeding, but up to 20% will present with little or no external bleeding when the margins of detachment are above the cervical os.