U.S. twin births more than doubled from 1980 to 2009.
A friend shared a stat
It's true. How big is it? Four answers, and your first pick has to be right to spot it.
A friend shared a stat
U.S. twin births more than doubled from 1980 to 2009.
It's true. How big is it? Four answers, and your first pick has to be right to spot it.