History Main / SexShifter

* The shapeshifting Skrulls of the Franchise/MarvelUniverse can change their sex as well as their appearance. For example, in ''ComicBook/{{Runaways}}'', Karolina turns out to be [[Arrangedmarriage engaged to]] Super Skrull-in-training Xavin thanks to her parents' actions. She objects not because she isn't sold on the marriage (since it's the only way to stop a war between their species), but because Xavin's male and she's a lesbian, so Xavin solves the issue by showing her that they can take a female form. They end up switching between male and female form for all their appearances afterwards.

* The Skrulls can change their sex as well as their appearance. In ''ComicBook/{{Runaways}}'' Super Skrull in training, Xavin, is engaged to Karolina for an ArrangedMarriage set up by their parents as a peace keep measure between their races. Karolina isn't interested not because she isn't sold on the marriage thing, but because she's a lesbian. Xavin handily solves this by showing her his/her female form and [[PerfectlyArrangedMarriage and Karolina has no complaints]].

* In ''Film/JurassicPark'' the cloned dinosaurs were able to get around the genetic manipulations that made them all female thanks to the [[LegoGenetics frog DNA used to complete their genomes]].

* ''Series/GenV'': can shift between male and female forms which have different powers. This is also tied to their identity as they're bigender.

* The eponymous junior high school boy of ''Manga/FutabaKunChange'' becomes a girl whenever he becomes sexually aroused and changes back some arbitrary amount of time after his arousal passes. This runs in his family; the man Futaba always believed to be his father actually gave birth to him, whilst his sister exploits her male form to bed a string of women. It's ultimately explained that their family has this ability because [[spoiler:they're descendants of a stranded race of {{Human Alien}}s for whom this is normal.]] [[spoiler:And it turns out Futaba's love interest is actually a distant relative, so they awaken this ability in her so she and Futaba can always be together]].

* ''Manga/RanmaOneHalf'': Because of the [[GenderBender specific]] [[InvoluntaryShapeshifting Jusenkyō curse]], Ranma Saotome can change between genders, turning into a girl when cold water is splashed on him, and changing back when hot water is splashed on her. One arc antagonist from later on is Prince Herb of the Musk Dynasty, who suffers from the same curse.

* ComicBook/{{Loki}}, as a shapeshifter can take any human form, male or female. Seen most notably in his own series, ''ComicBook/LokiAgentOfAsgard''.

* ''Series/GenV'': Jordan can shift between male and female forms which have different powers. This is also tied to their identity as they refer to themselves as bigender.

* ''Anime/ScienceNinjaTeamGatchaman'' one of the show's most famous plot twists involves Berg Katse, the second-in-command of the Galactor organization. It eventually turns out that not only is "he" the [[TwoAliasesOneCharacter same person]] as a recurring female Galactor commander, also a sex changing mutant created by [[BigBad Leader X]] fusing two fraternal twins in the womb. Though unable to control it in their youth, Beg Katse has complete control of this power by the time of the series proper.

* Alex Fierro in ''Literature/MagnusChaseAndTheGodsOfAsgard'' will shift randomly between genders; Comes with territory of having [[VoluntaryShapeshifting Loki]] as your mother.
* In ''Literature/{{Mistborn}}'', a Kandra's physical form depends on the bones that they're wearing. They have some degree of control, as illustrated by [=TenSoon=] guessing at the form of a set of bones he's never worn before (the surprise of the Kandra who gave him the bones). Despite this, Kandra characters have a consistent pronoun attached to them, whether their current body conforms to it or not. Kandra also create, "true bodies," made of materials like wood or crystal, and sometimes with structures that would be exceptional or even impossible for human bones. [=MeLaan=] is shown using her true body to switch between male and female on the fly.

* ''Manga/JigokurakuHellsParadise'': The Tensens, being PlantPeople created to achieve perfection, can shift between male ("yang") and female ("yin") forms.

* A newly introduced mermaid-tribe from ''Series/{{Siren}}'' are all born female, but are able to transition to male in order to reproduce by going in a specific pool.

* SuccubiAndIncubi are often thought of as the same being, just shifted into a different sex. The usual modus operandi they're given is that a Succubus seduces a human man for his genetic material, then transforms into an Incubus to seduce a human woman to impregnate her with said genetic material. This leads to the woman having a demonic baby... [[ArtisticLicenseBiology somehow]]...

* ''WesternAnimation/{{Kaeloo}}: WordOfGod is that due to being a frog, Kaeloo can change her sex.

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* Creator/{{Marvel}}:
** The Skrulls can change their sex as well as their appearance. In ''ComicBook/{{Runaways}}'' Super Skrull in training, Xavin, is engaged to Karolina for an ArrangedMarriage set up by their parents as a peace keep measure between their races. Karolina isn't interested not because she isn't sold on the marriage thing, but because she's a lesbian. Xavin handily solves this by showing her his/her female form and [[PerfectlyArrangedMarriage and Karolina has no complaints]].
** ComicBook/{{Loki}}, as a shapeshifter can take any human form, male or female. Seen most notably in his own series, ''ComicBook/LokiAgentOfAsgard''.
** Apex from ''ComicBook/AvengersArena'' is an interesting case. She shares her body with her brother and their body shifts gender depending on who is in control.
** The ''ComicBook/{{Eternals}}'' can change their appearance, including their sex, when the great machine resets and resurrects them. Many of them choose to do this fairly often by Eternal standards - every 20 to 25,000 years or so.

* ''ComicBook/FinePrint'': All the Cubi and Cupids can instantly change their sexes as they'd like.

* In ''Fanfic/HarryAndTheShipgirls'', both Inari Ōkami and their sword Kogitsune-Maru's avatar are prone to changing between a male and female form on a whim.

[[folder:Films — Live-Action]]

* The Tim Daly/Sean Young film ''Film/DrJekyllAndMsHyde'' takes the old Jekyll-and-Hyde story to another level by making Jekyll male and Hyde female.

* Alex Fierro in ''Literature/MagnusChaseAndTheGodsOfAsgard'' will shift randomly between genders; Comes with territory of having [[VoluntaryShapeshifting Loki]] as your mother.
* Virginia Woolf's ''[[Literature/OrlandoABiography Orlando]]'' more or less spontaneously turned into a woman. ''ComicBook/TheLeagueOfExtraordinaryGentlemen'''s reinterpretation has that happen every few years, owing to his/her father Tiresias.

* In [[Creator/MCAHogarth M.C.A. Hogarth's]] ''Literature/TalesOfTheJokka'', Jokka can change genders at two points in their life, once in the first seven years of their life and again in the second seven. Some never Turn, others Turn once, some Turn then Turn back to their original gender, and a few rare individuals have the chance to be all three sexes.
* In F.M. Busby's ''The Breeds of Man'' geneticists searching for a cure to an infertility plague caused by an AIDS cure GoneHorriblyWrong accidentally turn some people into serial hermaphrodites that alternate between male and female monthly based on menstruation.

* One of Creator/NeilGaiman's short stories in the ''Smoke and Mirrors'' anthology concerns the massive paradigm shift that society undergoes when an experimental gene therapy intended to treat cancer has the unexpected side effect of performing an overnight and totally reversible GenderBender.

* In ''Literature/TheKharkanasTrilogy'', the prequel to the ''Literature/MalazanBookOfTheFallen'', it is revealed that Elder God K'rul is able to change his sex at will, and does so every other century or so whenever he feels like having a change. He also can and did become pregnant at least once. It's not too surprising as all Azathanai are shapeshifters but K'rul seems to be the only one able and/or willing to shift between sexes.
* In Creator/SimonRGreen's UrbanFantasy works, Jacqueline Hyde is a descendant of Dr. Jekyll who used her ancestor's formula too much, periodically transforming into Mr. Hyde. Jacqueline and Hyde are deeply in love but can never meet directly.
* Noel "Double Helix" Matthews in ''Literature/WildCards''. Born intersexed, they (well, he prefers "he") gained the ability to change between fully male and fully female. This actually allows a small degree of {{Humanshifting}}, possibly by altering the precise balance of hormones. As a bonus, he can teleport, but only during the day in a male form and only at night in a female form.
* In Creator/NKJemisin's ''Literature/InheritanceTrilogy'', the GodOfChaos Nahadoth uses [[AFormYouAreComfortableWith human manifestations]] of all genders and has had children in a variety of reproductive roles. The distinctions are fairly academic to a being whose true form is infinite, inchoate primordial darkness.

* A newly introduced mermaid-tribe from ''Series/{{Siren}}'' are all born female, but are able to transition to male in order to reproduce by going in a specific pool.

* ''Series/InFromTheCold'': Anya can take on a male form due to her body-morphing ability temporarily.

* In ''TabletopGame/{{GURPS}}'' "Hermaphromorph", from ''GURPS Bio-Tech'' is a five-point trait that allows a character to do this.
* ''TabletopGame/EclipsePhase'' has a "sex switch" [[BioAugmentation BioMod]] that enables one to do this (and comes standard with [[SexBot Pleasure Pods]]), though the process takes a week.
* In ''TabletopGame/{{Munchkin}}'', the 'Freudian Slipper' allows the user to change sex (in-game, obviously) whenever it suits them most. If they lose the slipper and they're not their (real-life) biological sex, however, the former user is at a disadvantage in their next combat as normal for Sex Change Curses.
* In ''TabletopGame/KitsuneOfFoxesAndFools'', the kitsune Hayaku can change genders at will, for free at the beginning of each turn and by spending one foxfire any other phase. Fellow kitsunes Saski and Sareiko once had a competition to see who could seduce Hayaku first; the result was that Saski impregnated Hayaku with the twins Ai & Midori, while Hayako knocked up Sareiko with Seiki.
* Changelings in ''TabletopGame/{{Eberron}}'' are born asexual, develop their proper gender in early puberty, and then become capable of fully shifting sexes when their powers fully mature in mid-puberty.
* One of the tricks available for Lunars in ''TabletopGame/{{Exalted}}''. Their patron god-goddess-whatever-it-feels-like-today Luna does so on a regular basis, including appearing as a [[MisterSeahorse pregnant man]] on occasion.

* ''TabletopGame/{{Aeon}}'':
** The Qin are small slug-like aliens who regularly switch sexes.
** Any Psion with enough [[VoluntaryShapeshifting Biokinesis]] can modify apparent gender and then their physical sex as a matter of course.

* ''VideoGame/{{Runescape}}'': The Makeover Mage Pete/Peta frequently changes their own sex with the same magic they use to perform {{Gender Bender}}s for player characters.

* The artificial lifeform Penelope from Ben Nu~nez's ''Webcomic/JustAnotherWebComic'' was built as a sentient sex toy by MadScientist Eryl Keydon. Penelope can change gender and species on command, though she seems most comfortable as a [[CatGirl female feline]]. See volume 2, page 32 where Penelope recites her tech specs, though be advised: this web comic is patently Unsafe For Work.

* The ''[[https://mangadex.org/title/56189/fate-grand-order-daily-chaldea-doujinshi/chapters/ Daily Chaldea]]'' version of [[VideoGame/FateGrandOrder Ritsuka Fujimaru]] has been changing gender for so long they no longer remember what their original gender was (#574). Their family studied shapeshifting in hopes of PowerCopying phantasmal creatures and failed, leaving this as their specialty (#649). It has the RequiredSecondaryPowers of [[MagicPants transforming their clothes]].

* Angels on ''Fanfic/Earth27'' can undergo the Rite of Rebirth, which sometimes changes their sex and appearance. Since many angels don't like the idea of changing who they are, they only undergo the ritual sporadically or in dire situations, like being near death.

** [[HornyDevils Succubi]] have been able to do this since at least the third edition of the game through their {{Humanshifting}} powers, all the better to lead mortals into temptation.

* Ryoga Hibiki decides to undergo a magical procedure to "replace" his [[BalefulPolymorph Jusenkyo Spring of Drowned Pig]] curse with a Spring of Drowned Girl curse in ''Fanfic/VoyagesOfTheWildSeaHorse'', having decided that turning into a girl is far less of a life-threatening hassle than turning into a small pig.

* One of the many magic keys from ''ComicBook/LockeAndKey'' allows a person to do this.

** [[ComicBook/{{Thor}} Loki]], as a shapeshifter can take any human form, male or female. Seen most notably in his own series, ''ComicBook/LokiAgentOfAsgard''.