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, ...

Men with strong, fast-swimming sperm may not only have better fertility, but also longer lives, a new study suggests. Researchers tracked more than 78,000 men over 50 years and found that those with ...

It’s not uncommon for Health and Human Services Secretary Robert F. Kennedy Jr. to mention sperm counts when he makes a public appearance. In recent television interviews, political speeches and ...