1. Department of Obstetrics & Gynecology , October 6th University , Giza , Egypt
2. Department of Obstetrics & Gynecology , Al-Galaa Teaching Hospital , Cairo , Egypt
3. Department of Reproductive Health Research , National Research Centre , Giza , Egypt
4. Department of Obstetrics & Gynecology , Al-Azhar University , Assiut , Egypt
5. Department of Obstetrics & Gynecology , Al-Azhar University , Cairo , Egypt
6. Department of Obstetrics & Gynecology , Cairo University , Cairo , Egypt