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n a study of more than 40,000 women who gave birth to their first child between 1990 and 2014 at a Sydney hospital, researchers compared the mothers’ weight and outcomes of the births that occurred 1990-1994 and 2010-2014.
Researchers in Israel pooled data from almost 200 studies of male fertility and found that sperm counts among men in high-income countries, including Australia, have dropped by about 60% in the past four decades.