A little on this kind of disorder
During the developementof an organism, it passes through a stage where the gender is neither male nor female. As it developes, gender is then decided by hormones (Testosterone in the male specie and Estrogen and Progestorone in the female specie). Although these are present in both sexes, if the correct formula is not applied, this causes an imbalance and wreaks havoc on the body and soul. This can be manifested in a female homosapien having a small amount of beard or moustache and husky voice, or, a big herculean male with a high pitch squeeky voice and broad hips.
A hen (female bird) may also grow a Cock's comb, thus resembling a rooster. See chickens

We can therefore duduce from this, that, if there is more Testosterone than Estrogen and Progestorone, then there goes your male and, vice versa. The problem arises when there is equal amounts of the ingredients. Then all hell breaks loose. That's my little bit.

Since I don't know what is the pronoun for such a gender,
"him" and "her" will be substituted by "herm" and
"he" and "she" will be substituted by "heshe" in this article.

"Gender tests on South African athlete Caster Semenya have found she is a hermaphrodite, an Australian newspaper reported, as a senior official admitted she may not be 100 per cent female".
"Semenya calls gender debate 'a joke'"
Now, why does heshe thinks that this is 'a joke'?
In my opinion, If one looks and talks like a man then debating the topic is no joke.
Now folks, looking at the picture above, it is evedent that, that individual is either a man posing as a woman, or, a woman suffering from an overdose of anabolic steroids.
All this could have been speculation until.....

"Sydney's Daily Telegraph, citing an unnamed source involved in the tests on the world 800m champion, said she had both male and female sex organs and no womb or ovaries."