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A child is conceived, but instead of simply mixing one male sperm and one female ovum, a third set of genes becomes involved (or more). Most often used in a FreeLoveFuture or as a result of BizarreAlienBiology, a child turns out to be the [[MixAndMatchMan genetic offspring of multiple people]] -- except, it was ''natural conception''. Perhaps we're dealing with [[BoldlyComing aliens]] or [[DivineParentage supernatural beings]] and it's normal for them to conceive children this way. Or maybe, this was just some freak occurrence which took ''everybody'' by surprise. However it went down, there was a mass-coitus and a baby happened. May be related to {{Polyamory}} or occur during APartyAlsoKnownAsAnOrgy. The situation may [[{{Pun}} conceive]] AnAesop about such activities.

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A child is conceived, but instead of simply mixing one male sperm and one female ovum, as we are used to in case of earthly [[https://en.wikipedia.org/wiki/Eukaryote Eukaryota]], a third set of genes becomes involved (or more). Most often used in a FreeLoveFuture or as a result of BizarreAlienBiology, a child turns out to be the [[MixAndMatchMan genetic offspring of multiple people]] -- except, it was ''natural conception''. Perhaps we're dealing with [[BoldlyComing aliens]] or [[DivineParentage supernatural beings]] and it's normal for them to conceive children this way. Or maybe, this was just some freak occurrence which took ''everybody'' by surprise. However it went down, there was a mass-coitus and a baby happened. May be related to {{Polyamory}} or occur during APartyAlsoKnownAsAnOrgy. The situation may [[{{Pun}} conceive]] AnAesop about such activities.
activities.

In RealLife (on Earth), eukaryotic organisms tend to have two biological sexes because they're diploidal, that is, have two sets of chromosomes, and the system in which one set comes from each parent is simplest. Besides, eukaryotic organisms also have mitochondria (some have plastids, as well), which, due to their origin as endosymbiotic bacteria, are not created from scratch, but have to be inherited from one parent (and only one - two different lines of mitochondria in one cell is just trouble), which is, again, simplest when one sex always passes the mitochondria to the offspring and one never does. There are other systems, though, but mostly in little known species. Some species have several ecological forms for one sex (often male), though.
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* ''Manga/DeliciousInDungeon'': Used for a gag in the "Nightmare" chapter, where Laios helps Marcille [[DreamEmergencyExit fight off]] a nightmare. Marcille tells him the monster they're running from already swallowed up Papa and Pipi, causing Laios to visualize a family tree that shows Marcille descended from a mama, a papa, and a pipi. Only later does Marcille explain that Pipi was the name of her pet bird.
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Trope was cut/disambiguated due to cleanup, General clarification on work content, Fixing formatting


* Flash-forwards in ''ComicBook/AdventureTime'' have briefly featured a young female barbarian warrior called Penelope who has characteristics of all three of Finn, Bubblegum, and Marceline. The "Mnemenoid" arc of the comic featured a potential future in which they are implied (as blatantly as is possible in an all-ages comic) to be in a three-way relationship.
* ''ComicBook/JudgeDredd'' SpinOff ''Armitage'' establishes that Steel's son is the result of Armitage's donated sperm being genetically wiped and reformatted with Steel's DNA in order for her to have a child with her wife. There's apparently a "Right to natural life" campaign against such a practice.
* In Marvel Comics, Odin and Friga conceive another child. Unfortunately, because they conceived her in a dimension where Surtr's essence was scattered, she inherits [[PlayingWithFire his]] [[OmnicidalManiac traits]] as well and threatens Ragnarok as an infant.
* ''ComicBook/{{Sillage}}'' has an alien species that apparently requires two "females" and a "male" for procreation, though no details are given as to how it works.
* Double Subverted by Tefe Holland from ''ComicBook/SwampThing''. Swampy and his wife wanted a child, but since he doesn't have the necessary equipment, ComicBook/JohnConstantine did it instead, although he was being possessed by Swamp Thing at the time. This resulted in Tefe being born human but with powers over The Green.
* Franchise/WonderWoman has at times been implied to be the daughter of her mother Hippolyta and ''all'' the goddesses who were involved in her fatherless creation -- Athena, Artemis, Aphrodite, Hestia, and Demeter -- though at other times Hippolyta is her only true parent, and [[ComicBook/WonderWoman1942 originally]] Hippolyta and Aphrodite were the two that created and gave life to her.
* In 2024, the long-FanPreferredCutContent of Nightcrawler from the ''ComicBook/XMen'' being the son of [[VoluntaryShapeshifting Mystique]] and her [[HomosexualReproduction lesbian lover Destiny]] became [[AscendedFanon retconned into being truth]], save for one tweak. In the story introducing this RetCon, ''X-Men Blue: Origins'', Mystique explains that she "borrowed" genes from the sperm she had...absorbed... from her trysts with both her human legal husband, Baron Christian Wagner, and her secret male lover, the demon/mutant Azazel, and spliced them into the genetic map of the sperm she produced to inseminate Destiny, thus making Nightcrawler a son of one biological mother and three biological fathers -- and possibly more. It's inferred that Azazel's DNA was the dominant admixture after Mystique's own. This keeps both of Nightcrawler's original origin stories "technically" true.

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* ''ComicBook/AdventureTime'': Flash-forwards in ''ComicBook/AdventureTime'' have briefly featured a young female barbarian warrior called Penelope who has characteristics of all three of Finn, Bubblegum, and Marceline. The "Mnemenoid" arc of the comic featured a potential future in which they are implied (as blatantly as is possible in an all-ages comic) to be in a three-way relationship.
* ''ComicBook/JudgeDredd'' ''ComicBook/JudgeDredd'': The SpinOff ''Armitage'' ''ComicBook/{{Armitage}}'' establishes that Steel's son is the result of Armitage's donated sperm being genetically wiped and reformatted with Steel's DNA in order for her to have a child with her wife. There's apparently a "Right to natural life" campaign against such a practice.
* ''ComicBook/TheMightyThor'': In Marvel Comics, ''ComicBook/AngelaAsgardsAssassin'', Odin and Friga conceive have another child. Unfortunately, because they conceived her in a dimension where Surtr's essence was scattered, she inherits [[PlayingWithFire his]] [[OmnicidalManiac traits]] as well and threatens Ragnarok as an infant.
* ''ComicBook/{{Sillage}}'' ''ComicBook/{{Sillage}}'': The comic has an alien species that apparently requires two "females" and a "male" for procreation, though no details are given as to how it works.
* ''ComicBook/SwampThing'': Double Subverted by Tefe Holland from ''ComicBook/SwampThing''. Holland. Swampy and his wife wanted a child, but since he doesn't have the necessary equipment, ComicBook/JohnConstantine [[Characters/{{Hellblazer}} John Constantine]] did it instead, although he was being possessed by Swamp Thing at the time. This resulted in Tefe being born human but with powers over The Green.
* Franchise/WonderWoman ''ComicBook/WonderWoman'': Wonder Woman has at times been implied to be the daughter of her mother Hippolyta and ''all'' the goddesses who were involved in her fatherless creation -- Athena, Artemis, Aphrodite, Hestia, and Demeter -- though at other times Hippolyta is her only true parent, and [[ComicBook/WonderWoman1942 originally]] Hippolyta and Aphrodite were the two that created and gave life to her.
* ''ComicBook/XMen'': In 2024, the long-FanPreferredCutContent of Nightcrawler from the ''ComicBook/XMen'' being the son of [[VoluntaryShapeshifting Mystique]] and her [[HomosexualReproduction lesbian lover Destiny]] became [[AscendedFanon retconned into being truth]], save for one tweak. In the story introducing this RetCon, ''X-Men ''[[ComicBook/UncannySpiderMan X-Men Blue: Origins'', Origins]]'', Mystique explains that she "borrowed" genes from the sperm she had...absorbed... from her trysts with both her human legal husband, Baron Christian Wagner, and her secret male lover, the demon/mutant Azazel, and spliced them into the genetic map of the sperm she produced to inseminate Destiny, thus making Nightcrawler a son of one biological mother and three biological fathers -- and possibly more. It's inferred that Azazel's DNA was the dominant admixture after Mystique's own. This keeps both of Nightcrawler's original origin stories "technically" true.
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* {{Justified}} in ''Literature/Aeon14''. Creating new {{Artificial Intelligence}}s is performed by a blending of ''minds'' rather than bodies, so AI can easily have more than two parents, and sometimes one or more parents is human. In one case, Tanis, her flesh-and-blood husband Joe, and her AI partner Angela blend minds to produce an AI daughter named Faleena to help keep their flesh-and-blood daughters out of trouble.
* In ''Agent to the Stars'' by Creator/JohnScalzi, the alien race who visits Earth can conceive children from arbitrary numbers of parents. The most prominent alien character, Joshua, is the child of the entire ship's crew and the first human to visit the ship.

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* {{Justified}} JustifiedTrope in ''Literature/Aeon14''. Creating new {{Artificial Intelligence}}s is performed by a blending of ''minds'' rather than bodies, so AI can easily have more than two parents, and sometimes one or more parents is human. In one case, Tanis, her flesh-and-blood husband Joe, and her AI partner Angela blend minds to produce an AI daughter named Faleena to help keep their flesh-and-blood daughters out of trouble.
* In ''Agent to the Stars'' ''Literature/AgentToTheStars'' by Creator/JohnScalzi, the alien race who visits Earth can conceive children from arbitrary numbers of parents. The most prominent alien character, Joshua, is the child of the entire ship's crew and the first human to visit the ship.

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