Thanks Nomad. However, Semenya does not have CAIS, as there is a noticeable response to testosterone, shown by a decline in performance a few years ago when taking drugs to limit T levels. PAIS (partial, as opposed to total) is a possibility though. What is apparent, looking at Semenya’s physique, is that this is an individual who has gone through testosterone induced male puberty. The ruling which Semenya was appealing against lists specific conditions which are covered, namely: (a) A Relevant Athlete is an athlete who meets each of the following three criteria: (i) she has one of the following DSDs: (A) 5α‐reductase type 2 deficiency; (B) partial androgen insensitivity syndrome (PAIS); (C) 17β‐hydroxysteroid dehydrogenase type 3 (17β‐ HSD3) deficiency; (D) congenital adrenal hyperplasia; (E) 3β‐hydroxysteroid dehydrogenase deficiency; (F) ovotesticular DSD; or (G) any other genetic disorder involving disordered gonadal steroidogenesis AND (ii) as a result, she has circulating testosterone levels in blood of five (5) nmol/L or above AND (iii) she has sufficient androgen sensitivity for those levels of testosterone to have a material androgenising effect So in order to be covered by this regulation Caster Semenya MUST: 1) be XY (biologically male) 2) have a recognised disorder of sexual development affecting male genitalia 3) have a demonstrable response to androgens (so not CAIS) 4) have a natural testosterone level above 5nmol/l (a figure some 3x that of XX women) The relevant regulations are here: http://www.femede.es/documentos/IAA...7wHiYZtYstBOhCr4AFNXqWCwX33JxJ6Vx2Z1vDe9EAxNs What I find astounding is that I can find those regulations and can see that to be covered by them Semenya must be a biological male, yet that is a task which is wholly beyond reporters working across various forms of the national media. Now, I wonder why that is...?