I thought the determination was done through chromosome testing?
Male = XY
Female = XX
The problem is those aberrant with wierd setups. Such as XXY and XXXY.
The thing is, any person with any sort of Y in the chromosome makeup SHOULD be determined as male. End of story. By strict definition of scientific classification, a person with an Y chromosome at all is male, no matter what the make up of the other chromosomal pattern is for humans. Chances are this person is an XXY and is partially andro immune. Meaning they put out testosterone but must of it is ignore by the body, but not all of it. There are quite a few cases of people being fully immune and are strictly males with the female body. They are XY chromosome, but their bodies are immune to all effects of andro and testosterone and other male hormones. As such, their bodies never responded to the stimuli to turn them into males. However, the hormone is still produced and they are sterile females because of it. They have the 100% body of a female, but are sceintifically males because of the chromosome make up.
Personally, I think any body with an Y chromosome, and that produces male level hormones, and their body responds to said hormones in any amount should not be allowed to compete as a female. They are not females scientifically speaking.
*editted for mixing my X and Y. At least I didn't try to use a Z or something.