Anastasios Tranoulis1, Lina Michala2. 1. 1st Department of Obstetrics and Gynaecology, University of Athens, Medical School, General Hospital "Alexandra", 80 V. Sofias Avenue, P.C. 11528, Athens, Greece. 2. 1st Department of Obstetrics and Gynaecology, University of Athens, Medical School, General Hospital "Alexandra", 80 V. Sofias Avenue, P.C. 11528, Athens, Greece. linamichalas@hotmail.com.