Abstract Purpose 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. Methods 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 it...