Some scholars, reporters, and United Nations officers, have circulated the figure of 163 million. Professor Christohe Guilmoto, a demographic expert at the University of Paris, explains that this number, “does not correspond to ‘missing women’ per se but to the number of additional women these countries would have if they had the same population sex ratio as the rest of the world. A real estimate of missing women consists in comparing sex ratio by age between affected countries and the rest of the world. … Doing so indicates that there were in 2010 about 126 million women missing from the countries most affected by sex imbalances at birth and excess female mortality.”13