Breadcrumb Home Diagnostic Medical Sonography (DMS) DMS 360 DMS 360: Obstetrical & Gynecological Sonography II Download as PDF Program Diagnostic Medical Sonography (DMS) Credits 3 As a continuation of DMS 320, this course is an in-depth study of obstetric sonography. Sonographic technique and image evaluation of the developing second and third trimester fetus and related disorders will be covered. Prerequisites DMS 320 Corequisites DMS 370