1. Department of Obstetrics and Gynecology, Ain Shams University, Cairo, Egypt;
2. Department of Obstetrics and Gynecology, Faculty of Medicine, Zagazig University, Cairo, Egypt;
3. Department of Reproductive Health Research, National Research Centre, Cairo, Egypt;
4. Department of Obstetrics and Gynecology, Al-Arish Hospital, Cairo, Egypt;
5. National Center for Radiation Research and Technology, Atomic Energy Authority, Cairo, Egypt