The report is from UN Special Rapporteur Reem Alsalem (on violence against women and girls), dated Aug 27, 2024 (A/79/325).
Exact quote: “According to information received, by 30 March 2024, over 600 female athletes in more than 400 competitions have lost more than 890 medals in 29 different sports.”
It cites submissions from groups including Women’s Liberation Front and International Consortium on Female Sport. The data aggregates cases across levels (not just Olympics/elite), where biological males competed in female categories.
This contrasts with Olympics specifically, where trans women have competed but won no medals.