Trends in the Prevalence of Live Macrosomic Newborns According to Gestational Age Strata, in Brazil, 2001-2010, and 2012-2014.

 To describe the trends in the prevalence of macrosomia (birth weight ≥ 4,000 g) according to gestational age in Brazil in the periods of 2001-2010 and 2012-2014.  Ecological study with data from the Brazilian Live Birth Information System (SINASC, in the Portuguese acronym) regarding singleton live newborns born from 22 gestational weeks. The trends in Brazil as a whole and in each of its five regions were analyzed according to preterm (22-36 gestational weeks) and term (37-42 gestational weeks) strata.