History Main / SexShifter

* A few animals are able to change their gender, such as clownfish, wrasses, moray eels, gobies and other fish.

*** Any Mage who's trained in Life magic can temporarily transform themselves or another person into the opposite sex. A prose interlude in one {{Sourcebook}} has a mage chew one of their peers out for trying to determine magically whether they're {{Transgender}}, since it's ''incredibly'' rude to pry.

* ''Webcomic/ElGoonishShive'': Grace can do this easily as part of her general shapeshifting power, though she typically sticks to being female. Later in the comic, Tedd gains a magic mark that lets him alter his sex at will... which everyone notes is [[https://www.egscomics.com/comic/2014-08-25 incredibly redundant]] since he had the technology to do that ''anyway'' and frequently made use of it. Also, because of an improper magical awakening and excessive buildup of magic energy, Elliot not only ends up with multiple spells that let him turn into a girl, but he ''needs'' to turn into a girl regularly or else he might [[PowerIncontinence transform without meaning to]].

* ''Literature/WhateleyUniverse'' has a few, naturally enough, with Heyoka, Reach, Fling, Jimmy T., Chimera, Pounce, and (in the Gen 2 stories) Reinforce, Bewitched, and Ping-Pong being the main examples. However, most of these cases has some degree of BlessedWithSuck to them: Heyoka changes uncontrollably depending on the spirits which s/he bonds with, Jimmy T. has trouble controlling who (or what) s/he shifts into while asleep, Chimera is actually two HalfIdenticalTwins sharing a single body, Reach shifts on a semi-random basis every two weeks or so, Pounce has to be a CatGirl for several hours each week or suffer painful side effects, Reinforce gets a temporary ShapeshifterModeLock if he shifts too many times in a rapid succession, Bewitched has drastic personality shifts when female which their male form hates, and Ping-Pong switches form uncontrollably when sexually aroused. Perhaps the one who has it worst is Fling, who changes both physically and psychologically in response to lust, becoming whomever the person s/he's nearest to most desires, which can really suck if that person wants a bimbo, or worse, is a sadist.

* Incubi and succubi have shapeshifting powers in Amber Panyko Williams' ''Webcomic/DanAndMabsFurryAdventures'' universe. This includes gender changing at will, though it takes much time and practice to do well. Abel Rewanz demonstrates the boy-to-girl morphing in strip [[http://www.missmab.com/Comics/Vol_690.php #690]], and again in strip [[http://www.missmab.com/Comics/Vol_1038.php #1038]], much to Daniel's chagrin.

* ''Webcomic/ElGoonishShive'': Grace can do this easily as part of her general shapeshifting power, though she typically sticks to being female. Later in the comic, Tedd gains a magic mark that lets him alter his sex at will... which everyone notes is incredibly redundant since he had the technology to do that ''anyway'' and frequently made use of it. Not to mention all of Elliot's powers revolving around this.

* Alex Fierro in Literature/MagnusChaseandtheGodsofAsgard seems to be one; at least her voice changes between boy and girl mode.

* The MonsterOfTheWeek in the ''Series/{{Grimm}}'' season 4 episode "Double Date" is a member of a worm-like Wesen species that can change gender at will. It becomes clear that [[MultiGenderedSplitPersonalities each gender has its own personality]], but they [[SplitPersonalityTeam live together symbiotically]].

Some species, mostly fish, amphibians, and invertebrates, are capable of changing sexes under certain circumstances. In fiction it is sometimes possible for other creatures, even humans in some cases, to do this as well.

* ''Manga/RanmaOneHalf'': Because of the 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.

* 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 pregnant man on occasion.

Subtrope of GenderBender. May involve BizarreAlienSexes. Usually a part of any in story in which ShapeshiftersDoItForAChange.

** Kobolds in the same edition will spontaneously change sex if there's a severe imbalance in the male to female ratio of a warren as a result of casualties inflicted by monsters or adventurers. As kobolds egg-laying reptilian humanoids who lack any sexual dimorphism, this is not something that they consider a big deal beyond the way it helps their species survive in a hostile world.

* ''Literature/WhateleyUniverse'' has a few, naturally enough, with Heyoka, Reach, Fling, Jimmy T., Chimera, Pounce, and (in the Gen 2 stories) Reinforce being the main examples. However, most of these cases has some degree of BlessedWithSuck to them: Heyoka changes uncontrollably depending on the spirits which s/he bonds with, Jimmy T. has trouble controlling who (or what) s/he shifts into while asleep, Chimera is actually two HalfIdenticalTwins sharing a single body, Reach shifts on a semi-random basis every two weeks or so, Reinforce gets a temporary ShapeshifterModeLock if he shifts too many times in a rapid succession, and Pounce has to be a CatGirl for several hours each week or suffer painful side effects. Perhaps the one who has it worst is Fling, who changes both physically and psychologically in response to lust, becoming whomever the person s/he's nearest to most desires, which can really suck if that person wants a bimbo, or worse, is a sadist.

* Alex Fierro in Literature/MagnusChase and theGods ofAsgard seems to be one; at least her voice changes between boy and girl mode.

* Alex Fierro in Literature/MagnusChaseandtheGodsofAsgard seems to be one; at least her voice changes between boy and girl mode.

* Alex Fierro in Literature/MagnusChaseandtheGodsofAsgard seems to be one; at least her voice changes between [[Transgender boy and girl mode]].

* Noel "Double Helix" Matthews in ''Literature/WildCars''. 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.

[[folder:Fan Works]]

[[folder:Films -- Live-Action]]

* The MonsterOfTheWeek in ''Series/TheXFiles'' episode aptly titled "GenderBender" is a member of an (apparently) alien humanoid species whose biological gender changes every time after they have sex.
* The MonsterOfTheWeek in the ''Series/{{Grimm}}'' season 4 episode "Double Date" is a member of a worm-like Wesen species that can change gender at will. It becomes clear that [[MultiGenderedSplitPersonalities each gender has its own personality]], but they [[SplitPersonalityTeam live together symbiotically]].
* Mork from Series/MorkAndMindy states that Orkans' "parts are interchangeable".

*** The white male General regenerates into a [[RaceLift black]] woman in "Hell Bent". Not only that, her dialogue indicates that all of the incarnations ''before'' the male General have been female as well.
*** The Doctor finally gets their turn in "Twice Upon a Time", as they regenerate into a woman in their thirteenth incarnation. Unlike Missy though, she seems to go with a more androgynous look. Then again, she doesn't really seem to mind either, as her response to seeing her own reflection for the first time shows.
---->'''The Thirteenth Doctor:''' ''(grinning)'' Oh, brilliant!
** "The Hand of Fear" shows a Kastrian regenerating from female to male, and being surprised that the Doctor is surprised by it, as he should know all about regeneration.
* A notorious convention anecdote in relation to ''Series/BabylonFive'' has Creator/JMichaelStraczynski responding to all the HoYay fan reaction to Londo and G'Kar by distributing a joke script to the actors in which G'Kar changed sex to become female, revealing that Narn are biologically capable of doing it as a response to being in an unduly one-gender environment, and promptly tried to seduce Londo, while still being played by Andreas Katsulis. The actors were apparently entirely enthusiastic about it.

[[folder:Web Comics]]

* In ''TabletopGame/{{GURPS}}'' "hermaphromorph" is a five-point trait that allows a character to do this.

* Because of the Jusenkyō curse, Ranma Saotome of ''Manga/RanmaOneHalf'' 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.