Study design and Ethical Approval
Sampling was composed by 496 women attended at the Obstetric Center of the University Hospital Dr. Miguel Riet CorrĂȘa Jr. in the city of Rio Grande, Southern Brazil, between . All subjects (parturients) provided a written informed consent for participation in the study. Sociodemographic, obstetrical and gynecological data were obtained by applying a self reported questionnaire. The present work was approved by the Research Ethics Committee at the Health Area (CEPAS) of the Federal University of Rio Grande-FURG (protocol number 54/2011), RS-Brazil.