The demand for American sperm is increasing around the world, & not because of what you think:
It’s not about the superior fitness of American males, exactly. One reason is that the US’s immigration history means lots of ethnic diversity. For some would-be mothers from other parts of the world, this can give US product a leg up over places like Denmark, another sperm exporting powerhouse.
Another is all that tracking and testing: the U.S. has some of the world’s highest standards for disease testing and donor screening. The FDA defines sperm as human tissue, and regulates it much as it does the donation of organs.