Lipitz, S.; Frenkel, Y.; Seidman, D.S.; Zolti, M.; Meizner, I.; Mashiach, S.; Lipitz S.; Department of Obstetrics and Gynaecology, The Chaim Sheba Medical Centre; Frenkel Y.; Department of Obstetrics and Gynaecology, The Chaim Sheba Medical Centre; Seidman D.S.; Department of Obstetrics and Gynaecology, The Chaim Sheba Medical Centre; Zolti M.; Department of Obstetrics and Gynaecology, The Chaim Sheba Medical Centre; Meizner I.; Department of Soroka Medical Centre; Mashiach S.; Department of Obstetrics and Gynaecology, The Chaim Sheba Medical Centre