Experts fret over dwindling sperm counts
Male fertility is in a downward spiral with data showing sperm concentration has dropped by 52% among men in the developed world in recent decades.
However, no one seems to know exactly why.
Research by Professor Niels Skakkebaek from the University of Copenhagen suggests that a deterioration in sperm quality should be interpreted alongside trends in testicular cancers.
As he reports in the BMJ, countries with a high incidence of this cancer have generally lower semen quality and vice versa.
Worryingly, incidence of this cancer has risen substantially over