1. US Unit, Department of Obstetrics and Gynecology, Soroka University Medical Center, Ben Gurion University of the Negev, Beer Sheva, Israel;
2. Department of Radiology, Soroka University Medical Center, Ben Gurion University of the Negev, Beer Sheva, Israel;
3. US Unit, Department of Obstetrics and Gynecology, Emek Medical Center, Afula, Israel