What is the correct line to draw in professional sport when a woman, who has female sex organs and XX chromosomes has naturally occurring levels of a hormone that provide huge competitive advantages against other women?
What DSD condition are you referring to? Testosterone is produced by testes, which are male reproductive organs.
(I suspect you may be confused or misinformed regarding males with 5-ARD, who have a Y chromosome and internal testes, and no female organs.)