Testing the biological sex of an athlete is becoming more common in sport, with governing bodies defending the practice as safeguarding fairness for women. But as the introduction of mandatory genetic ...

Certain genetic traits can significantly influence an athlete’s performance. For example, variants of the erythropoietin gene that lead to increased red blood cell production — and therefore greater ...

In August 2025, within weeks of each other, two international federations, World Athletics (WA) and World Boxing (WB), announced that participation in the women’s category now requires certified ...

Last week, the International Olympic Committee announced it will determine whether athletes are eligible for women’s events by mandating a once-in-a-lifetime screening for the male-determining gene, ...

The chime on H. Lee Sweeney’s laptop dings again—another e-mail. He doesn’t rush to open it. He knows what it’s about. He knows what they are all about. The molecular geneticist gets dozens every week ...

Bay Area heat advisory runs to 10 p.m. Thursday, with inland highs near 105. An ozone alert adds risk for heart and lung patients, kids, and seniors. Surprise Medical Bill Protections Still Shield ...

Jon Entine, author of Taboo: Why Black Athletes Dominate Sports and Why We’re Afraid to Talk About It,” takes stock of the DNA London Olympics–where, as usual, African-descended athletes swept the ...