1. Department of Obstetrics and Gynecology, Ribeirao Preto Medical School; University of Sao Paulo (DGO-FMRP-USP); Ribeirao Preto Brazil
2. Evangelical University Hospital of Curitiba; Curitiba Brazil
3. School of Health Technology - Ultrasonography School of Ribeirao Preto (FATESA-EURP); Ribeirao Preto Brazil