Thanks to IVF, the US has one million more twins Quartz, 21 Apr 2014 From about 1915, when the statistical record begins, until 1980, about one in every 50 babies born was a twin, a rate of 2…
The IVF Effect: How the U.S. Got a Million (!) Extra Twins The Atlantic, 17 Apr 2014 The twins are taking over.