Aging men often lose the Y chromosome in a growing number of their cells—and it may be far more dangerous than once believed.

In 2002, evolutionary biologist Jenny Graves shared a controversial calculation. The human Y chromosome, she wrote two years later in a commentary, "is running out of time." The male-determining sex ...

Men tend to lose the Y chromosome from their cells as they age. But because the Y bears few genes other than for male determination, it was thought this loss would not affect health. But evidence has ...

During National Cancer Prevention Month, a Los Angeles man explains why genetic testing for BRCA and other mutations matters for men and how action saves lives. Cunaplus_M.Faba Getty Images For most ...