Sperm show age
By John Travis
Looks like women aren’t the only ones who need to worry about their biological clock when it comes to having a baby. A new study indicates that the quality of men’s sperm declines with age.
Women’s fertility decreases until menopause, when ovulation ends. In contrast, men produce sperm throughout their lives. However, the sperm of an elderly man don’t equal those of a young one, Brenda Eskenazi of University of California, Berkeley and her colleagues report in the February Human Reproduction.