1. Department of Obstetrics and Gynecology, Faculty of Medical Sciences; University of Campinas; Unicamp, Campinas São Paulo Brazil
2. Section of Ultrasonography; Prof. José Aristodemo Pinotti Women's Hospital, CAISM, University of Campinas; Unicamp, Campinas São Paulo Brazil
3. Department of Pathologic Anatomy, Faculty of Medical Sciences; University of Campinas, Unicamp; Campinas São Paulo Brazil