title: Possible explanation for the lower-than-expected preterm birth rate.
authors.forename: Marc-André
authors.initials: MA
authors.lastname: Blanchette
authors.forename: Claudie
authors.initials: C
authors.lastname: Laprise
mesh_terms: D054242:Emigrants and Immigrants; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D011247:Pregnancy; D047928:Premature Birth / Q000453:epidemiology*; D015983:Selection Bias; D012959:Socioeconomic Factors