Gender row athlete: What is intersexuality?

The case of South African athlete Caster Semenya has sparked worldwide interest following reports that she will be tested by sporting officials to determine whether she is male or female. ...the IAAF are testing to see whether Semenya has a rare genetic disorder that means she has female genitalia but male chromosomes.
Check out Intersexuality and How Sex is Determined for the genetic explanation of XY females.

The default of all human beings is female
"If you are insensitive to androgens, you will grow up looking like a girl because the default of all human beings is female. However if the body, when it's developing, is not guided into turning into a male, then it will always be female."

Caster Semenya: Intersection of Intersexuality and Eunuchs
For more than half a century it was common for doctors to carry out reversal operations, either through castration [known as castrated Eunuchs, check out Eunuchs of the Sun (Jesus on Homosexuality and the Third Gender and Eunuchs, Hijras, the Third Gender and the Bible] or constructing a new vagina, on babies whose genitals were seen as either too big or too small.

The Nobodies

Beware of the Nobodies, the wanderers and the lost souls. The beings without hearts searching for somewhere to belong.

Organization XIII (XIII機関, Jūsan Kikan^?) is a fictional group of characters featured in Square Enix and Disney Interactive Studios' Kingdom Hearts video game series. Kingdom Hearts is a crossover of various Disney settings based in a universe made specifically for the series. The group is comprised of thirteen Nobodies, or beings without hearts.
Source: Wikipedia

Eunuchs of the Sun (Ancient Homosexuality and the "Third Gender")

Jesus on Eunuchs of the Sun (Homosexuality and the "Third Gender")
"12For some are eunuchs because they were born that way [EUNUCH OF THE SUN]; others were made that way by men; and others have renounced marriage[c]because of the kingdom of heaven. The one who can accept this should accept it."
Source: Matthew 19:12

Two Types of Eunuchs
"The two types of eunuchs undoubtedly represent a standard categorization. According to the rabbis there were two sorts of eunuchs, those of human device and those of nature's making (cf. m. Zab. 2.1; m. Yeb. 8.4; b. Yeb. 75a, 79b). The first type was spoken of as being seris adam, literally 'eunuch of man.' The second type was spoken of as being seris hamma, literally 'eunuch of the sun', that is, from the first seeing of the sun, a eunuch by birth (b. Yeb. 79b, 80a; cf. Eusebius, H.E. 7.32).

"The 'eunuch of the sun' was one who had been born with defective male organs or one who had otherwise been rendered impotent by circumstances of his birth."
Source: Matthew 19-28 by Davies, Dale C. Allison

Intersexuality and How Sex is Determined

"If the Y [Male] chromosome is present in the embryo's cells, a gene within the short arm of the chromosome called SRY [SRY stands for sex-determining region of the Y chromosome] will turn on, initiating a chemical chain reaction that will turn on other genes and stimulate the production of male hormones[Testosterone]. If the X [Female] chromosome is present, or if the SRY [Sex determining region of the Male or Y chromosome] gene is missing from the Y [Male] chromosome, the embryo will develop into a female [Because the Sex Determing Region of the Male Chromosome is missing, a 'XY genetic male' - will develop into a 'XY biological female'] via mechanisms that are not fully understood."
(Read More) at PBS 'How is Sex determined?'

Also Check Out
Eunuchs, Hijras the Third Gender and the Bible

Eunuchs, Hijras, the Third Gender and the Bible

Jesus on Marriage, Divorce and Eunuchs (Matthew 19:3-12)

 ³Some Pharisees came to him to test him. They asked, "Is it lawful for a man to divorce his wife for any and every reason?"
 ⁴"Haven't you read," he replied, "that at the beginning the Creator 'made them male and female,'^{[a] 5}and said, 'For this reason a man will leave his father and mother and be united to his wife, and the two will become one flesh'^[b]? ⁶So they are no longer two, but one. Therefore what God has joined together, let man not separate."
 ⁷"Why then," they asked, "did Moses command that a man give his wife a certificate of divorce and send her away?"
 ⁸Jesus replied, "Moses permitted you to divorce your wives because your hearts were hard. But it was not this way from the beginning. ⁹I tell you that anyone who divorces his wife, except for marital unfaithfulness, and marries another woman commits adultery."
 ¹⁰The disciples said to him, "If this is the situation between a husband and wife, it is better not to marry."
 ¹¹Jesus replied, "Not everyone can accept this word, but only those to whom it has been given. ¹²For some are eunuchs because they were born that way; others were made that way by men; and others have renounced marriage^[c]because of the kingdom of heaven. The one who can accept this should accept it."
- Source: Matthew Chapter 19

Eunuchs in India

In India, nearly half a million people live as eunuchs (or Hijras), not man or woman, but considered an entirely separate gender.

Egyptian Third Gender

Inscribed pottery shards discovered near ancient Thebes (now Luxor, Egypt), and dating from the Middle Kingdom (2000-1800 BCE), contain a listing of three genders of humanity: males, eunuchs, and females, in that order. (See Sethe, Kurt, "Die Aechtung feindlicher Fürsten, Völker und Dinge auf altägyptischen Tongefäßscherben des mittleren Reiches," in: Abhandlungen der Preussischen Akademie der Wissenschaften, Philosophisch-Historische Klasse, 1926, p. 61.)

In the Egyptian story of the creation of the archetypal beings (gods), the first being is male and female, and its name is Atum. Through asexual reproduction, Atum divides and creates two other beings, Shu and Tefnut. These two in turn produce another pair, Geb and Nut. Finally, Geb and Nut, the earth and the sky, combine and produce the two pairs of Isis and Osiris, and Seth and Nephthys. Isis exemplifies the reproductive female, Osiris the reproductive male, Seth the nonreproductive eunuch, and Nephthys the unmarried virgin.
Source: Egyptian Third Gender

SpiritLink continues to grow as a space where the full diversity of our community can be seen and represented. Learn more about our expanded inclusion of Two-Spirit and intersex identities and why thoughtful representation matters.

https://spiritlinklgbt.com/updates/two-spirit-intersex

Born Eunuchs: Homosexual Identity in the Ancient World
Thesis with works cited, annotations and listed citations of Eunuchs in secular and Christian literature.

Also Check Out
A Lifestyle Distinct: The Muxe of Mexico
Two Spirits