Are sperm counts really declining
28 Aug The possibility that sperm counts are in decline has been a source of contention for decades. We need better studies to document changes in sperm count, as well as new work to identify possible causes, if the decline is real. 25 Jul Sperm counts in men from America, Europe, Australia and New Zealand have dropped by more than 50 percent in less than 40 years, researchers said on Tuesday.
Sperm Counts Plummet In Western Men, Study Finds
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Sperm count falling sharply in developed world, researchers say | Reuters
Sperm Counts Plummet In Western Countries, But Why? : Shots - Health News : NPR
Description:They also said the rate of decline is not slowing. Both findings — in a meta-analysis bringing together various studies — pointed to a potential decline in male health and fertility. The analysis did not explore reasons for the decline, but researchers said falling sperm counts have previously been linked to various factors such as exposure to certain chemicals and pesticides, smoking, stress and obesity. Studies have reported declines in sperm count since the early s, but many of those have been questioned because they did not account for potentially major confounding factors such as age, sexual activity and the types of men involved.