1. The usefulness of gestational sac and placental sonographic morphology in differentiating between second‐trimester tubal and abdominal pregnancy: Case report and a review of literature. Issue 3 (2nd August 2013) Authors: Liu, Joseph; Khan, Ambereen; Johnson, Samuel; Grigorian, Cheryl; Li, Tao Journal: Journal of clinical ultrasound Issue: Volume 42:Issue 3(2014:Mar./Apr.) Page Start: 162 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗