Tokyo 2020: What are the testosterone rules in women's athletics?

The complex testosterone regulations in track and field have become an issue again at the Olympics after two teenagers from Namibia qualified for the women’s 200-meter final

Rules governing Olympic runners send a disturbing message to female athletes, especially those who are Black

EXPLAINER: What exactly are track's testosterone rules?

Mboma and Masilingi to miss Olympic 400m over World Athletics testosterone rules

Olympian Caster Semenya wins appeal over testosterone rule

IAAF regulations for female athletes with high testosterone levels

Semenya Misses Tokyo, May Be Forced Out of Olympics for Good – NBC Bay Area

Five women banned from Tokyo Olympics events – The Hill

Trans women should not have to reduce testosterone, say new IOC guidelines, Olympic Games

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Olympics committee finally changes policy on trans athletes

Testosterone limits for female athletes based on flawed science, CU Boulder Today

Athletics - latest news, breaking stories and comment - The Independent

IOC: Trans Women Shouldn't Have to Reduce Testosterone to Compete at Olympics

Teenagers make 200 final in Olympic testosterone controversy