Sperm counts and fertility have been dropping for a hundred years. This could become a problem.
Women having fewer children could be explained by societal changes that mostly converge to women having more life options and control over their fertility. The drop in sperm count is not easy to explain, but everybody wants to attribute the decline to whatever agenda suits them.
In my first quarter at The Ohio State University, I took Bio 100 because, at the time, I was majoring in natural resource management. Everyone majoring in a non-STEM field took it.
The professor was an engaging lecturer, with some wit. He was explaining dominant and recessive genes, and explained how inbreeding increases the chances of passing along harmful, recessive traits. He ended with, “So if you want to have the healthiest kids, breed with someone of a different race.” In 1979, this was a mildly subversive thing to say.
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