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Sperm concentration has declined 50 percent in 40 years in three continents

Men in Europe, North America and Australia have had dramatic declines in sperm quality, according to a meta-analysis of 185 studies.

The research — the largest and most comprehensive look at the topic, involving data from 185 studies and 42,000 men around the world between 1973 and 2011 — appears to confirm fears that male reproductive health may be declining.

Source: Sperm concentration has declined 50 percent in 40 years in three continents

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