[1] Ain Shams University,Department of Obstetrics and Gynecology, Faculty of Medicine
[2] World Health Organization,Department of Sexual and Reproductive Health Including UNDP/UNFPA/ UNICEF/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction
[3] Al Azhar University,Department of Obstetrics and Gynecology, Faculty of Medicine
[4] Kafrelsheikh University,Faculty of Medicine
[5] Ain Shams University,undefined