How sex test using saliva or cheek swab will determine a woman’s eligibility to compete in elite sports | Explained News
5 min readMumbaiMar 28, 2026 06:36 AM IST In a seismic decision on Thursday, the International Olympic Committee (IOC) banned transgender women and DSD (Differences in Sex Development) athletes from competing in the female categories. Further, it added that any woman wanting to compete in international sport must now undergo a mandatory SRY gene screening, or a sex test. Here’s what to know. What is the SRY Gene? SRY stands for ‘sex determining region Y’. The SRY gene is a segment of DNA that is almost always on the Y chromosome, signalling the presence of testes/testicles and “initiating male sex development by the production of testosterone”, the IOC said. Professor Andrew Sinclair, who first discovered the SRY gene in 1990, had said last year that it is not an accurate marker. “If there is a change in the SRY gene so it does not function as usual, then a person can fail to develop testes and be biologically female,” he wrote in The Conversation last year. So why has IOC decided to screen athletes for the SRY gene before …









