>> Interpretation: "Chromosomal analysis reveals Male karyotype."
>> A karyotype means an individual's complete set of chromosomes. Females have XX chromosomes, males XY.
The last line is an oversimplification that the author, as many others, uses to jump to conclusions. As the BBC article reports, quoting Alun Williams:
>> “It’s obviously a very good marker, as most people with a Y chromosome are male… but it’s not a perfect indicator.”
>> For some people with DSD, the Y chromosome is not a fully formed typical male Y chromosome. It may have some genetic material missing, damaged or swapped with the X chromosome, depending on the variation.
Also, something that's been a bit annoying throughout this affair: a "male karyotype" is not "XY", it's "46, XY" and a female karyotype is "46, XX". At least that's the normal male/ female karyotypes and some people with DSDs have variations thereof, like the 47, XXY karyotype of Kleineflter's Syndrome (a "trisomy").
In any eventuality, as the BBC article says, a male karyotype does not a male make, let alone a man. As a for instance, this is an article that reports natural birth in a woman with predominantly 46, XY karyotype:
Report of Fertility in a Woman with a Predominantly 46,XY Karyotype in a Family with Multiple Disorders of Sexual Development
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2190741/
This was a case of a woman with mosaicism, which means some of her cells had one set of chromosomes and other cells another. The karyotype of her ovaries was predominantly 46, XY, i.e. what the pundits keep calling "male" and less than 1% 46, XX, i.e. "female", by the pundits. And yet, not only did she menstruate regularly, she had two unassisted pregnancies and gave birth to a daughter. Imagine now if this woman was an athlete who had failed a gender test for having "XY chromosomes" as widely reported for the two Olympic boxers. A woman who has given birth is a male and should be competing in a men's category? How does that square with anything anyone knows or believes about gender or sex?
It is because of this kind of situation that is not unheard of and is not that rare in the grand scheme of things that the scientists in the BBC article, as well as the IOC, find it so difficult to say with certainty what is a man and what is a woman. Because despite what we all think we know, when we reach the limits of physical conditions, as is common in sports, the limits begin to become a blur.