The Four-Hour Body, by Tim Ferriss. There's a chapter on gaining progeny, for those who want that; he observes that when you put a cellphone next to rats for an hour a day their sperm count and free testosterone are lowered.
Strangely, I couldn't find a place in the book where he directly cites the dozens of studies he says he read; but he does quote from this one: http://www.ncbi.nlm.nih.gov/pubmed/19578660