For any reader who believes that any female person can have testosterone in the 'male range' please look at this chart.
Plus
This is from a PCOS advocate on twitter.
PCOS raises female testosterone to up to 5.5 nmol/L (and above 4 can cause serious issues).
5-ARD raised Caster's testosterone to 21 nmol/L.
twitter.com/NathanielHart72/status/1550916276490477568?s=20&t=E8muLvV5kUEpbPeemz8zwQ
and
twitter.com/seaningle/status/1537480540068225031?s=20&t=E8muLvV5kUEpbPeemz8zwQ
Sean Ingle (Guardian sports journalist) mentioned this
The latest scientific publications clearly demonstrate that the return of markers of endurance capacity to "female level" occurs within six to eight months under low blood testosterone, while the awaited adaptations in muscle mass and muscle strength/power take much longer (two years minimum according to a recent study). Given the important role played by muscle strength and power in cycling performance, the UCI has decided to increase the transition period on low testosterone from 12 to 24 months. In addition, the UCI has decided to lower the maximum permitted plasma testosterone level (currently 5 mol/L) to 2.5 mol/L. This value corresponds to the maximum testosterone level found in 99.99% of the female population.
Plus
https://onlinelibrary.wiley.com/doi/epdf/10.1111/sms.14581
The International Olympic Committee framework on fairness, inclusion and nondiscrimination on the basis of gender identity and sex variations does not protect fairness for female athletes
“In adulthood, circulating testosterone concentrations do not come close to overlapping between females (0.1–1.7 nmol/L) and males (7.7–29.4 nmol/L).”