https://www.tas-cas.org/fileadmin/user_ ... A_IAAF.pdf
* Caster Semenya has XY chromosomes
* Caster Semenya has testicles
* Caster Semenya's testicles produce normal male levels of testosterone
* Caster Semenya's body responds to testosterone normally
* Caster Semenya's body cannot convert testosterone to dihydrotestosterone (DHT) (5-ARD)
There is some medical disagreement as to whether or not
(a) Caster Semenya is merely a mediocre male (the lack of DHT is irrelevant to sporting performance)
(b) Caster Semenya's lack of DHT is a material disadvantage compared to males who produce DHT
However in either case, Caster Semenya's testes create a big advantage compared to females with ovaries.
The clear effect of lacking DHT is malformed external genitals.
Athletes with 46 XY DSD are “gonadally male”, meaning they have functioning
testes that produce sperm and circulating testosterone levels within the normal
male range. The only physical/biological differences between androgensensitive 46 XY DSD athletes and non-DSD male athletes are that their testes
are not descended and their external genitalia may be undervirilised. Such
individuals may have a female legal sex and/or gender identity; however this
does not affect athletic performance. Therefore if their androgen receptors
iunction properly, they will have exactly the same performance advantages over
female athletes as non-DSD males athletes have. O
Separately studies suggest that 5-ARD results in a male gender identity.
https://onlinelibrary.wiley.com/doi/ful ... andr.12108
Fifteen patients were reared as females while 14 were reared as males. 12 of the 15 reared as females had gender dysphoria and underwent gender reassignment.
I.e. despite being raised female, most asserted themselves as male, while all raised as male continued to be male.
So the evidence suggests that Caster Semenya has a male intersex condition, not a female intersex condition. However, Caster Semenya asserts a female gender identity. Certain individuals with 5ARD have had gonadectomies as children, but Caster Semenya is not such an individual.