There have been many instances where women have been barred from competing because of higher testosterone naturally produced in their bodies. 

A prime example being that of Dutee Chand, an Indian sprint runner who was barred from competing because of her high testosterone levels. But later, she was allowed to compete and the allegations were discharged because there was not much scientific evidences that could be put up against her. But it was not the same for Semenya of South Africa, who had to limit herself to 200m sprint running because all the other competitions still keeps the limit in the testosterone levels valid barring her from competing in any of these competitions.

Most the women targeted by World Athletics' policy on testosterone levels are intersex, with a similar set of sex traits: they have XY chromosomes, but their bodies do not respond to androgens in the same way most XY individuals do. Because of the complexity inherent in the function of hormones, it is extremely difficult to determine the precise effect that testosterone will have on these intersex people.

Keeping a limit to the testosterone levels of a female athlete can lead to invasive medical analysis and it then questions a person’s womanhood. Hence allowing transgender individuals to participate in sports brings up the topic of using testosterone levels as a legal form of discrimination. So unlike the popular belief that transgender people are trying to invade women athelets spaces, the truth remains that being inclusive towards transgender people can only be beneficially in entirety.

It can be seen as a legal form of discrimination because most times people barred from competing are those who do not fit the neat categories that determine who is a man and who is not. And that would mostly include transgender people, intersex people and some black women who genetically produce higher levels of testosterone compared to other women.