1. Fertility Medicine and Gynaecological Endocrinology Unit, Department Woman-Mother-Child, Lausanne University Hospital, 1011 Lausanne, Switzerland
2. Department of Women, Infants and Adolescents, Division of Obstetrics, Geneva University Hospitals, 1211 Geneve, Switzerland
3. Zoology Department, Faculty of Science, Al-Azhar University, Nasr City, Cairo 11651, Egypt
4. Discipline of Anatomy & Histology, School of Medical Sciences, University of Sydney, Sydney, NSW 2006, Australia