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 1181041790 T1 Shoulder Dystocia in Emergency Delivery 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=1181041790 RD 2023/01/27 AB Shoulder dystocia is defined as failure to deliver the fetal shoulders following delivery of the head. Dystocia is caused by impaction of the fetal shoulders against the pelvic outlet. Often, it is diagnosed by retraction of the fetal head against the perineum after delivery (“turtle sign”). Risk factors include gestational diabetes, prior shoulder dystocia or delivery of large infants, and postterm delivery.