title: [Epidemiology of preterm birth: current trends].
authors.forename: Heloisa
authors.initials: H
authors.lastname: Bettiol
authors.forename: Marco Antonio
authors.initials: MA
authors.lastname: Barbieri
authors.forename: Antônio Augusto Moura
authors.initials: AA
authors.lastname: da Silva
mesh_terms: D005260:Female; D006801:Humans; D011247:Pregnancy; D047928:Premature Birth / Q000453:epidemiology* / Q000209:etiology
vernacular_title: Epidemiologia do nascimento pré-termo: tendências atuais.