Elie Nkwabong1, Clovis Ourtchingh2, Thierry Mvondo2. 1. Department of Obstetrics and Gynecology, University Teaching Hospital/Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, P.O. Box 1364, Yaoundé, Cameroon. 2. Department of Obstetric and Gynecology, Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon.