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Count down : how our modern world is threatening sperm counts, altering male and female reproductive development, and imperiling the future of the human race

by Swan, Shanna H. (Author), Colino, Stacey (Author)

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"In 2017, author Shanna Swan and her team of researchers completed a major study. They found that over the past four decades, sperm levels among men in Western countries have dropped by more than 50 percent. They came to this conclusion after examining 185 studies involving close to 45,000 healthy m... Full description


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