Figure 3
From: Born Too Soon: The global epidemiology of 15 million preterm births
Preterm births by gestational age and region for the year 2010. Based on Millennium Development Goal regions. Source: Reproduced with permission from Blencowe et al. (2012) National, regional and worldwide estimates of preterm birth rates in the year 2010 with time trends since 1990 for selected countries: a systematic analysis and implications. Lancet 379(9832): 2162-2172.