1. Department of Radiology, Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil
2. Department of Radiology, Hospital Moinhos de Vento, Porto Alegre, Brazil
3. Department of Obstetrics and Gynecology, Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil
4. Department of Obstetrics and Gynecology, Hospital Moinhos de Vento, Porto Alegre, Brazil
5. Postgraduate Program in Health Sciences: Gynecology and Obstetrics at Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
6. School of Medicine, UFRGS, Porto Alegre, Brazil