In the cases of Peru and the Plurinational State of Bolivia, the curve for the final year is further from the equidistribution line at all points), indicating that the distribution of undernutrition became more unequal in these two countries over the period. For Brazil and the Dominican Republic, it is the other way around, with the final year curve being below the starting year curve at all points, indicating an improvement in the distribution of the indicator. In the cases of Colombia, Haiti and Honduras, the concentration curves cross over, here, the concentration index must be calculated to draw any conclusion about the evolution of inequality. The concentration index gives an idea of the scale of inequality, and is comparable over time and between countries. This has occurred throughout society, narrowing social divides in fertility levels. However, the reproductive timetable, particularly for the first child, is still fairly early, particularly among adolescents in sectors with lower incomes and less education.