Corn and wheat were genetically modified in prehistoric times (i.e. before there were written records), the same goes to dogs and cattle. While unmodified dogs still exist (wolves), unmodified cattle became extinct. None of the basic foods exist in pre-modified form.
So now they can do it faster. Big deal. If mass sterility is a problem caused by GMOs, you would see it among groups such as Mormons and Orthodox Jews, but in fact both groups have close genetic cousins with whom they share diet (both eat GMOs), but only the seculars have falling fertility, somewhat proving that the well documents fall in fertility is caused by religion and culture, not diet.
Abusing small rodents with disgusting experiments designed to get tenure for professors proves very little. Such experiments in the past have proved whatever the professor thinks will get him tenure. A century ago, they proved that Jews and Blacks were inferior, since at the time that was a politically correct view (which is how democratic governments enacted the holocaust in Europe and Jim Crow in America – relying on best science).
Your hypothesis that GMOs cause infertility is easy to test, and the evidence is pretty overwhelming that GMOs are safe.