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Anime & Manga
- In The Day of Revolution, the supposedly male protagonist discovers in the first chapter that he is intersex and genetically female. Despite some misgivings and with a push from her parents she decides to reinvent herself as a girl. Hilarity Ensues.
- In Earth Maiden Arjuna, one of the female ecology activists has this as a result of medication her mother took while pregnant.
- Kyoko, the protagonist of one of the arcs of Level E, is found to be one. Unfortunately, that might spell the end of Mankind (long story).
- The protagonist from Robert A. Heinlein's —All You Zombies—, who starts out as an intersex female and...it gets complicated. Her actual degree of intersexualization approaches true hermaphrodism and wouldn't be biologically possible, except there's no logical reason why she'd be human anyway.
- Calliope (later Cal) from the book Middlesex was born intersex (genetically XY) and raised female until the age of fourteen. Notably, her being Raised as the Opposite Gender was completely unintentional on the part of both her doctors and her parents, since the doctor was nearsighted and had no idea that she was actually male.
- Cal also meets a woman with Complete androgen insensitivity syndrome, an intersex condition that causes the woman affected to be born with a vagina, but with XY chromosomes, no uterus, and internal testes where the ovaries would typically be. Despite being able to pass as a woman, she strongly identifies herself as a hermaphrodite and is an intersex rights activist.
- The original incarnation of Sadako of The Ring was this, thanks to androgen insenstivity. In the book, she was thrown into the well by a doctor who had raped her, and then found out she was intersex.
- A lot of the young adult novel None of the Above by by I.W. Gregorio deals with the teenage protagonist dealing with the realization that she has AIS.
Live Action TV
- In one episode of Law & Order: Special Victims Unit, the episode starts with a rapist getting killed by his victim and the DNA evidence leads the detectives to a teenage boy who just happens to have an ironclad alibi. It turns out his twin "sister" is actually his twin brother; it seems he lost his penis when they were circumcised as babies and the doctors who botched the operation covered their tracks by completing the job and talking his parents into raising him as a girl.
- Sadly, this is actually Truth in Television: The episode is based on an actual case. Just like the character in the episode, the real man vehemently reverted to a male gender identity as soon as he got the chance. Sadly, he ended up killing himself instead of killing the doctor like his fictional counterpart in SVU did.
- In one episode of House, a woman turns out to be suffering from testicular cancer, due to Androgen insensitivity syndrome note .
- This is a major plot point in an episode of Freaks and Geeks, when Ken's new girlfriend Amy tells her she's one of these. There was no DNA test or anything - the conflict came from Amy getting upset at Ken (who initially struggled with the revelation) telling his friends her big secret.
- In one episode of CSI, a DNA sample with female chromosomes turned out to belong to a male character. He was a post-operation trans man and it wasn't known that he was transgender.
- In one episode of Anna & Kristina's Grocery Bag, Anna and Kristina couldn't figure out which part of their lobsters was the coral, which part was the roe and which were the "intestine-y bit(s) one should not eat" and Kristina asked if lobsters were hermaphrodite-both [male and female]. As it turns out, they needed female lobsters for their recipe but the cookbook they were testing did not divulge that detail.
- In one episode of Whose Line Is It Anyway?, during a game of Party Quirks, Colin was playing a character who suspected that people were not the gender they purported themselves to be and he spent his time during the game feeling up his fellow contestants.
- In Faking It, Lauren's plot revolves around some pills she's taking and very defensive about. The rest of the main cast eventually finds out that she's intersex and androgen-insensitive.
- In Orphan Black, the genetic original person for both the female and male clone batches turns out to be the same person, an XX woman who had XY chromosomes in some of her cells due to chimerism.
- The character Ramona in Sticky Dilly Buns is defined to be a fairly classic case of 17-beta-Hydroxysteroid dehydrogenase III deficiency, a condition similar to androgen insensitivity syndrome (see below under Real Life). She's a well-adjusted heterosexual woman; the fact mainly serves to bemuse some of the other characters.
- The big reveal in The Saga of Tuck is that the titular character's increasingly feminine appearance is due to 'his' being a chromosomal chimera, with both XX and XXY sets of chromosomes. Tuck was actually intersex at birth, though the doctors never told his family that they had 'corrected' this, a fact that made his mother furious when they learned the truth.
- Chimerism has been found to be the cause of rare — sometimes seemingly impossible — coat colors in several species of animal, including dogs, cats, and horses. One particular horse appeared to be a stallion, but was found to have a blend of stallion and mare DNA; calico tomcats are the feline equivalent.
- Cross-sex chimerism can also occur in birds, although their mechanism of sex chromosomes is different (ZZ males vs ZW females). In fact, it's common enough that captive-breeders of parrots have a term ("half-sider") for a bird that displays one sex/color on one side and a different sex/color on the other.
- Human chimerism exists as well, but so far it has primarily been identified in women whose partners requested paternity testing of their children. The results showed that the father's DNA matched the children's but the mother's didn't. More extensive follow-up tests showed that the mothers' blood, skin or saliva (the most common mediums for DNA testing) had one DNA profile while her ovaries had another.
- In human beings and most types of animals all embryos begin with undifferentiated gonads connected to both ductus (vas) deferns and oviducts (Fallopian tubes). By default the gonads will develop into ovaries and the vas deferens will disappear, but usually the presence of a Y chromosome causes an androgen reaction that makes the gonads instead become testes and the Fallopian tubes wither away whilst retaining the vas deferens. Complete androgen insensitivity syndrome is an intersex condition that causes the woman affected to be born with a vagina, but with XY chromosomes, no uterus, and internal testes where the ovaries would typically be. These women overwhelmingly identify as female and heterosexual.
- The "switch" for a fetus developing as a male is primarily controlled by just a single gene on the Y chromosome. The SRY gene is so crucial that a mutation on just this one gene can cause an XY female, and its translocation to an X chromosome can cause an XX male.
- XX male syndrome is a rare intersex condition that causes the male affected to have XX chromosones, as well as small testes, varying degrees of gynecomastia, poor facial hair growth, and diminished libido. Men and boys with the condition are otherwise not particularly feminine.
- These cases tend to hit the news every Olympic year as various female athletes are accused of or found to be intersex even though no one has ever demonstrated these women actually derive any unfair advantage from this that exceeds those derived from other natural variations such as height, bone density or muscle mass. There is considerable evidence that most of these conditions actually make them immune to any boost XX females might get from male hormones.