Objective: To assess the prevalence of sexual initiation until the age of 14 years old, as well as sociodemographic and behavioral factors.
Methods: In 2008, 4,325 from the 5,249 adolescents of the 1993 birth cohort in Pelotas, Rio Grande do Sul, were interviewed. Sexual initiation was defined as the first intercourse up to the age of 14 years old.