作者单位:Department of Obstetrics and Gynecology, Al-Azhar University, Cairo, Egypt[1]Department of Pediatrics, October 6th University, Cairo, Egypt[2]Department of Obstetrics and Gynecology, El-Galaa Teaching Hospital, Cairo, Egypt[3]Department of Obstetrics and Gynecology, October 6th University, Cairo, Egypt, Tel.: +201001230161[4]