1. Department of Obstetrics and Gynecology , Faculty of Medicine , Cairo University , Cairo , Egypt
2. As-Salam International Hospital , Cairo , Egypt
3. Department of Obstetrics and Gynecology , Faculty of Medicine , Sixth of October University , Cairo , Egypt
4. Department of Obstetrics and Gynecology , Faculty of Medicine , Fayoum University , Fayoum , Egypt
5. Department of Obstetrics and Gynecology , Faculty of Medicine , Beni Suef University , Beni Suef , Egypt