SON 2121 - Obstetrics and Gynecology Sonography 1 SON 2121 - Obstetrics and Gynecology Sonography 1 The student will be introduced to the first trimester of pregnancy including its related anatomy, physiology, and possible pathology and/or complications. Embryology, early fetal development, sonographic identification and imaging of the embryo and fetus, transabdominal and transvaginal scanning techniques will be covered. Occupational (A.S. and A.A.S.)