Sykes: "Open discussion and debate [on male-born transgender athletes' participation in competitive women’s and girls’ sports] are sorely needed."
I would suggest the following approach
The normal range of natural testosterone for men is 300 to 1,000 nanograms per deciliter (ng/dL) or 10 to 35 nanomoles per liter (nmol/L)
The normal range of natural testosterone for women is 15 to 70 ng/dL or 0.5 to 2.4 nmol/L
To allow their participation in competitive women’s and girls’ sports, enforce a continuous cap on trans-women's testosterone of 70 ng/dL or 2.4 nmol/L, which must be demonstrated by continuously meeting the limit for six consecutive months before the event(s)
This cap would not apply to cis-women's natural levels of testosterone
.
Sykes: "Open discussion and debate [on male-born transgender athletes' participation in competitive women’s and girls’ sports] are sorely needed."
I would suggest the following approach
The normal range of natural testosterone for men is 300 to 1,000 nanograms per deciliter (ng/dL) or 10 to 35 nanomoles per liter (nmol/L)
The normal range of natural testosterone for women is 15 to 70 ng/dL or 0.5 to 2.4 nmol/L
To allow their participation in competitive women’s and girls’ sports, enforce a continuous cap on trans-women's testosterone of 70 ng/dL or 2.4 nmol/L, which must be demonstrated by continuously meeting the limit for six consecutive months before the event(s)
This cap would not apply to cis-women's natural levels of testosterone
https://www.mountsinai.org/health-library/tests/testosterone
.