When Setchell reviewed sperm counts over a 60-year period starting in the early 1930s, he found no change for either cattle or pigs and a slight, but significant, increase in sheep. Crucially, ...

When talking about fertility in routine practice, we usually refer to the World Health Organization’s guideline of roughly 15 million sperm per millilitre (and around 39–40 million total per ejaculate ...

Men's sperm counts have more than halved over the past 50 years, with potentially drastic consequences for the future of the human race. About one in six adults worldwide experience infertility at ...

The widely held view that sperm counts in men are dropping around the world may be wrong, according to a new study by University of Manchester, Queen’s University in Kingston, Canada and Cryos ...