Georgios C Pratilas1, Alexandros Sotiriadis2, Konstantinos Dinas2. 1. Second Department of Obstetrics and Gynecology, Medical School of Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece. Electronic address: georgepratilas978@gmail.com. 2. Second Department of Obstetrics and Gynecology, Medical School of Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.