So the sperm count of men in the UK dropped by 29% between 1989 and 2002... according to a survey of men attending a certain fertility clinic in northern Scotland. The researchers speculate that lifestyle factors such as obesity and alcohol may be to blame, but there's at least one critical piece of information missing from the report: has the average age of men using the facility changed? In America, at least, the average age that people are having their first child has been rising, and I imagine that if there's a similar phenomenon in the UK it would affect this survey of fertility clinic patients.



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