title: [Aspects of early sexual activity].
authors.affiliation: Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil.
authors.forename: Lucia Alves da Silva
authors.initials: LA
authors.lastname: Lara
authors.affiliation: Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil.
authors.forename: Carmita Helena Najjar
authors.initials: CH
authors.lastname: Abdo
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D006801:Humans; D012725:Sexual Behavior / Q000502:physiology