History Main / ImmortalProcreationClause

* ''Series/TheTwilightZone1959'': The episode "[[Recap/TheTwilightZoneS5E143QueenOfTheNile Queen of the Nile]]" features a movie actress who remains remarkably youthful despite starring in films from the Silent Age (this taking place in the 1960s). She is accompanied by an old woman who acts as a maid. [[spoiler:It turns out that the actress is none other than Cleopatra, who regains her youth by draining the life force from other people... and the old woman is her mortal ''daughter''.]]

* In ''WesternAnimation/TheDragonPrince,'' Rayla mentions that Sky Dragons only lay one egg every thousand years, which is why they're considered so precious.
* Fairies in ''WesternAnimation/TheFairlyOddparents'' are forbidden to have children, mostly because A) they're immortal and don't really need to, B) A newborn fairy's RealityWarper powers are dangerously unstable and C) the last one born was [[MikeNelsonDestroyerOfWorlds Cosmo]]. The only reason Poof exists is that [[LoopholeAbuse no one forbade their godchildren from wishing for them]].
** More accurately, Jorgen keeps forgetting to implement that rule, so it's possible that there may have been more Fairy babies brought into life (explaining Poof's peers in nursery school.) Poof seems to be a big case because of who his parents and godbrother are.

* PlayedWith in ''WesternAnimation/StevenUniverse.'' The immortal [[WizardsFromOuterSpace Gems]] do reproduce, but its an asexual process that [[BizarreAlienReproduction grows them out of the ground]] [[spoiler:and sucks the life force out of a planet]]. They're BornAsAnAdult and have no real families, until [[PosthumousCharacter Rose Quartz]] [[InterspeciesRomance hooked up with a human]] gave birth to the title character. This process however, killed Rose and left her HeartDrive in Steven's body.

This trope includes extremely LongLived characters and species with low birth rates, as they fit on the sliding scale properly. The most common example of this is elves; Tolkienesque elves generally are TheAgeless and can have children; their population is mitigated by a low birth rate (a typical elf couple can live together for several thousand years and produce only one or two children in all that time), the occasional violent death, and the tendency for older elves to [[PutOnABus journey across the sea to a mystical land, never to be seen again]].

* ''Franchise/FullmetalAlchemist'': Homunculi, creatures created by alchemy, are stated as unable to reproduce. They exist outside of any ecosystem.

* ''Webcomic/{{Drowtales}}'' plays with this, in that drow are TheAgeless[[note]]Something WordOfGod has said is ''technically'' not true in that they have a finite lifespan of somewhere over 1000, but almost none of them survive long enough to reach this[[/note]] but some, including Ash'waren and Zala'ess, are known for their [[MassiveNumberedSiblings extremely large families]], but they tend to be the outliers on the far end of the scale. Meanwhile Diva'ratrika Val'Sharen is over a thousand and has only had five (surviving) daughters and one son, which the suggestion that politics has played a role in this. Meanwhile, during a 15 year timeskip, Mel'arnach has three children, which suggests fae are able to have multiple kids within a short amount of time with relatively little trouble, and drow in particular elevate motherhood to a sacred level, with one character's ''losing'' her ability to have more children playing a critical role in her motivations and actions. The CrapsackWorld nature of the environment means that despite people having lots of kids the population has stayed relatively stable due to the high chance of death.

* The alien race known as the Silent Ones in ''WebOriginal/OrionsArm'' use a treatment that completely halts aging but severely stunts the development of their larvae, so they keep small groups of mortals to replace the few immortals that die. However most Terragen (human-derived and/or created) sophonts are effectively immortal and decidedly ''not'' infertile, the population being in the quadrillions about 10500 years in the future.

** Given that he's [[AnythingThatMoves Jack Harkness]], he should have lots and lots of children and grandchildren running around if that was the case, not just one family. It makes more sense that the Time Agency routinely sterilised its agents (Would you let people like Jack or John run around in eras without reliable birth control and potentially father their own ancestors?) and that the daughter in season 3 was the result of a 1960s orgy. It's not like Jack is the jealous type who'd refuse to raise the kid as his.

* ''WebOriginal/LoomingGaia'':

* In the Literature/TideLords Tetrology, the immortals cannot interbreed with each other (The union of an immortal egg and an immortal sperm would become immortal at age -9 months and thus never come to term), but they can and frequently have interbred with mortals (There are four entire ''species'' who are descended entirely from the mortal offspring of immortals). Said children are always born mortal, but [[spoiler: those children whose heritage makes them more than 50% immortal by genetics (Such as an immortal father and one or more immortal ancestors in the mother's line) can potentially ''become'' immortal]].
* Completely ignored in Creator/RobertAHeinlein's ''Literature/TimeEnoughForLove.'' Many near-immortals live throughout the galaxy and reproduce like bunny rabbits, even if they're 20 centuries old. Their children may also be effectively immortal, depending on what genes they picked up and whether they have access to a rejuvenation clinic. They solve the overpopulation problem by continually colonizing new planets. Justified as reproduction was the entire ''point'' of the Howard Families. They were an experiment in human longevity that worked spectacularly well.

* Averted in Wen Spencer's "Literature/{{Tinker}}" series. The Oni are immortal and breed like mice. Famines are common in the Oni's overpopulated world. The Elves on the other hand are just as fertile as humans but don't feel the need to have as many children since they are immortal. The population of Elfland has dropped by 50% over the last two thousand years due to war, accidental death, and suicide.
* In Creator/JRRTolkien's legendarium, [[OurElvesAreDifferent Elves]] are immortal and only have children infrequently; overpopulation isn't a problem, especially since most of them are leaving Middle-earth by ''Literature/TheLordOfTheRings.'' In the stories set in the earliest time periods, though, there are frequently several generations of a single-family living and ruling together. There is also the implication that having children can be very spiritually draining for elves, and that they get bored with sex over the centuries. In his notes at one point, Tolkien indicated that elves do not have children after a certain age. (So, menopause?) Also, Fëanor and Nerdanel had the most children that any elven couple ever had, whereas seven children would be, if anything, low for most fertile human couples if they both lived through the women's child-bearing years in most eras.

* A key plot point in ''VideoGame/[[Bloodborne]]'', is that [[spoiler:The Great Ones are unable to have children of their own, and thus yearn for surrogates among humanity.]]

* Parodied in ''Webcomic/IrregularWebcomic'''s "Fantasy" storyline, [[https://www.irregularwebcomic.net/123.html where it's pointed out]] that Elven longevity also means that young Elves take ''centuries'' to grow past adolescence. As a result, the Elves invented prophylactics before they discovered how to use fire.

* Vampires from Meyers's ''Literature/{{Twilight}}'' were believed to be infertile, but it turns out that this only applies to the females. So the guys can still get it on with a human girl, but it's incredibly dangerous for the human woman.

* [[http://www.newscientist.com/blogs/shortsharpscience/2009/03/why-vampires-would-have-a-popu.html This blog post]] hilariously suggested that romances like the one in ''Literature/{{Twilight}}'' ''prevent'' vampire from population problem.

** ''LightNovel/FateRequiem'': This causes a stir when Erice Utsumi is revealed to be the daughter of the Servant Izanami and a human man, with several parties wondering how it is possible.

* In the short story [[http://www.gutenberg.org/files/21279/21279-h/21279-h.htm ''2 B R 0 2 B'']] by Kurt Vonnegut, medicine has conquered old age and death. The population numbers are kept under tight control to avoid resource overuse. This means you have to convince someone to volunteer to die in order to have children. The main character's wife is giving birth to triplets...

* The Sanzhiyan Humkara from ''Manga/SazanEyes'' are immortal until they usually lose their souls to Kaiyanwang's Humanization Ritual and are turned into humans. Apparently, also because of their ImmortalityImmorality, they do not reproduce often. The sole exception may be Kaiyanwang, who has an harem of wives and concubines so that he will always have a source of children to use in his Humanization rituals.

* Huey Laforet in ''LightNovel/{{Baccano}}'' procreated after becoming immortal [[ForScience just to see if this applied]]. His daughter doesn't inherit his immortality.

* Pure-Blooded Devils in ''LightNovel/HighSchoolDXD'' are implied to have 10,000 year lifespans, and proportionately low fertility. After the GreatOffscreenWar caused a severe depopulation, with the [[Literature/ArsGoetia 72]] former great houses being reduced to ''three'' and remnants, this has become a serious problem. As of the start of the series, even high-ranking devils of the remaining noble houses are recruiting from humans they personally reincarnate, just to get their numbers back up and stabilize the population. Things have gotten so desperate for the devils that it's stated point-blank (in the novels, at least) that FantasticRacism has been ''marginalized'' by how dire the situation is, and the proudest pure-blooded houses consider blood purity secondary to just surviving. The few who strictly stick to creating pure-blooded peerages are considered shortsighted and selfish by most of the population. On the other hand, StarterVillain Riser is able to strongarm the entire Gremory house into giving him Rias in an arranged marriage none of them support just by saying it's to preserve the Pure Devil race.[[note]]His exact motivations vary by adaption; in the original LightNovel, he did want the marriage for the purity and pride of the race and being married to drop-dead-gorgeous Rias was just a bonus, in the anime it's [[IHaveYouNowMyPretty the other way around]].[[/note]]

* In ''LightNovel/IsItWrongToTryToPickUpGirlsInADungeon'', the gods don't have parents or siblings. They have always existed and cannot have children with each other or with mortals.

* ''LightNovel/SoImASpiderSoWhat'':

* In ''LightNovel/SundayWithoutGod'', when people lost the ability to die due to God abandoning the world, they also lost the ability to give birth. As pointed out in-series, this makes Ai's existence even more perplexing, as she was born three years ''after'' God had abandoned the world.

* "Magic-born people" in ''LightNovel/ThatTimeIGotReincarnatedAsASlime'' can breed but usually don't because their immortality removes the need to leave descendants.

* The Cylons from ''Series/{{Battlestar Galactica|2003}}'' are immortal due to their resurrection technology. They are also near-universally infertile, with only a single [[HalfHumanHybrid half-human]] child born to the entire race.

* ''Series/BuffyTheVampireSlayer'' / ''Series/{{Angel}}'': With one important exception, the immortal vampires in the Franchise/{{Buffyverse}} cannot create natural children. Even in that one exception, the vampire mother could not bring the child to term the normal way, and the child was mortal (albeit with the superhuman strength, agility and senses of a vampire).
* Series/DoctorWho:

* In ''Series/{{Forever|2014}}'', Henry doesn't appear to have any children of his own, not for the lack of trying. He adopted Abe as a baby after finding him in Auschwitz after the [[UsefulNotes/WorldWarII war]]. In fact, Abe later finds out that they are, in fact, related, as Abe is descended from Henry's uncle.

* In ''Series/NewAmsterdam2008''', John Amsterdam has had several children, who, unlike him, are mortal. One of these children, Omar, looks older than John himself, and knows about John's immortality. One episode shows that John keeps records of his descendants, so he can keep track of them and [[SurpriseIncest avoid dating female descendants]]. Both Omar and an elderly female descendant shown in a flashback where John is secretly dating Omar's mother are upset when John tells them that he still hasn't found his soulmate. What John means is the one woman who would cause his "curse" of immortality to end.
* ''Series/StargateSG1''

** In the episode "[[http://stargate.wikia.com/wiki/2010_(episode) 2010]]" the Aschen weaponized this trope. After making contact with Earth they offered a treatment that would cure all diseases and drastically (though not infinitely) extend human lifetimes. After everybody on the planet got the treatment, SG-1 found out that it had a component not in the original formula; it caused sterility and would lead to the extinction of 90% of humanity. This was that civilization's way of taking over planets without a fight, just a bit of patience. Fortunately, the main characters were able to cook up some time-travel gimmick to warn their past selves to not allow this to happen.
* A second season episode of ''{{Series/Spellbinder}}'' has the protagonists end up in a parallel world where, somewhere around Enlightenment, a deadly plague wiped out a large number of people and threatened to make humans extinct. A cure was found that, miraculously, also made them immortal. Unfortunately, they found out too late that this trope was in full effect. No one subjected to the cure (all survivors) can conceive. Thus, when the protagonists arrive, it's been over 200 years since the plague, and the world still looks like it's in the middle of 18th century with almost no progress having been made, except with animatronics, which are used to make child-like automatons that the immortals can pretend to be children. When a MadScientist finds out that the arrivals (a teenage girl and a 20-some man) are fertile, he kidnaps them, intent on using them to repopulate the world or at least provide ''some'' new people around.
* ''Series/TidelandsNetflix'': Tidelanders (half human/half siren hybrids) live for centuries without aging, but aren't able to have children… or so it seems until Violca is impregnated by her lover Colton, a human.

* An episode of ''Series/TheTwilightZone1959'' features a movie actress who remained remarkably youthful despite starring in films from the Silent Age (this taking place in the 1960's). She was accompanied by an old woman who acted as a maid. [[spoiler: Turns out the actress is none other than Cleopatra, who regains her youth by draining the life force from other people. And the old woman? It's her mortal ''daughter''.]]
* In ''Series/TheVampireDiaries'', vampires cannot procreate. This actually comes up when Elena wonders whether, supposing Katherine was her ancestor, she was part vampire. Damon shoots this down and says that if Katherine had any children, it was before she became a vampire. Although Klaus, the Original Hybrid, can have children thanks to a loophole. In matters of procreation, his werewolf side trumps the vampire side. His daughter Hope is a tribrid (vampire, witch, and werewolf) and it's assumed she has the same loophole. Other vampire and werewolf hybrids don't seem to have this ability though.
* Angels in ''Series/{{Lucifer}}'' live forever and can't have children. This is probably the only reason why [[LovableSexManiac Lucifer]] hasn't sired a horde of devilspawn. [[spoiler: Turns out there's a loophole; if an angel regards itself as unworthy of being an angel, it becomes human until it regains its self-respect, and while human is capable of having children with another human.]]

** ''LightNovel/FateApocrypha'': Sieg asks Jeanne directly about this out of curiousity, to which Jeanne replies that this only applies if the Servant isn't incarnated with an actual physical flesh-and-blood body from the Grail, as their existing "bodies" are just magical energy shaped into an approximation of what they were in life. For example, Jeanne as she is [[WillingChanneler possessing the body of Laeticia]] could in fact get pregnant and give birth, though obviously she has no intention of doing so while in Laeticia's body [[spoiler:no matter what her growing feelings for Sieg say.]]

* In ''Literature/TheMoteInGodsEye'', the Moties ''{{invert|edTrope}}'' this -- if they don't have children, they die young and horribly, while as far as anyone knows a Motie who keeps getting pregnant and giving birth on schedule can live indefinitely. Oh, and the most likable group, the ones who learn English and talk to the humans of the series? They're sterile hybrids. They die after 25 years or so.

* The Greek gods can get old and have to rely on eating ambrosia which introduces a substance into their veins called Ichor that grants them immortality and insane regeneration abilities. This can't naturally be passed down to their children even if they are both deities.
** Zeus famously has no problem procreating like crazy, creating a nightmarishly TangledFamilyTree (such as Hercules being the great-great-grandson, and half-brother, of Perseus).
** The same also applies to the Norse gods and the apples of Idunn.

* In the sci-fi novel ''The Declaration'' by Gemma Malloy, immortality has been made possible. Unfortunately, nobody who "opts-in" is allowed to have children because of this. Any children, or "surpluses," born to people who opt in are sent to [[OrphanageOfFear group homes]] and taught that they are worthless beings that do not deserve to exist.

Related to CreativeSterility; this is a focus on sexual reproduction. It can result in a DyingRace if the immortals can still be killed.

* ''Anime/DarlingInTheFRANXX'': The human race as a whole has become immortal and unaging, but the treatment also caused them to become completely infertile as a side effect. The children seen in the show are created via cloning and genetic manipulation, [[spoiler:and even then, these children only exist because a FRANXX can only be piloted by a male and female together who are still capable of reproducing.]]
* In ''Manga/DeathNote'', there is a rule stipulating that {{Shinigami}} are not to reproduce or have sex with either other Shinigami or with humans. Even if they wanted to do it, they wouldn't be able to, because [[NoBiologicalSex they lack the necessary "equipment."]] [[note]] and even if they had the right stuff, they might not be able to produce viable {{Half Human Hybrid}}s anyway. [[/note]]

* Discussed in ''Manga/HeavensDesignTeam'', when the designers are tasked with creating an immortal animal. They use a simulation to show [[AudienceSurrogate Shimoda]] why in an unaging species, population growth tends towards zero, either because no aging means only the weak offspring are eaten by predators, or because overpopulation leads to starvation from limited resources (not to mention lack of genetic diversity leaves them all vulnerable to the same disease). They do show several examples of functionally immortal animals, like lobsters and jellyfish, both of which are frequently eaten by predators (or [[ExtremeOmnivore Jupiter]]).

** The vampire Evangeline has been around for hundreds of years, and presumably never reproduced. Although this may have more to do with the fact that she's evil, uber powerful, and scary as hell, as well as the fact that she gained immortality when she was ten years old [[NotGrowingUpSucks and has been stuck that way since]].

* ''Manga/PrincessResurrection'': This is specifically the reason for the Royals killing each other off. Since a fully mature Royal becomes a Phoenix who literally ''cannot die'', ThereCanBeOnlyOne to become one.

* Most elves of ''ComicBook/ElfQuest'' can only breed after a "recognition" (which is basically the instincts or [[WordofGod 'lizard brain']] of two elves deciding the two are genetically very compatible, and forcing them to conceive a child). One of the stories set before the Original Quest mentions that the tribe's [[HealingHands Healer]] tried, and was in one case successful, to break that limitation, because there were worries the tribe was too small. And later on [[spoiler:Leetah managed to induce Recognition for Nightfall and Redlance.]]

* In the ''Film/Underworld2003'' films, the immortal father of the vampire and lycan bloodlines seems to have stopped reproducing after his original three sons. At least, there's no indication that any other Corvinus bloodline existed for Lucien's agents to hunt down.
** Of course, considering that Alexander Corvinus has spent much of his immortal life "cleaning up" after vampires and lycans, keeping the existence of immortals secret, it's also possible he could have had other children in secret. Given how old he is, it could very well be that a good number of people are his descendants and don't know it (it's also made clear that not every descendant carries an inactive form of the immortality virus).

[[folder:Folklore and Mythology]]

** Of course, Zeus famously has no problem procreating like crazy, creating a nightmarishly TangledFamilyTree (such as Hercules being the great-great-grandson, and half-brother, of Perseus).

** However, the Old Testament does state that one of God's first words to a newly-created humanity is "Be Fruitful and Multiply", as well as that he gave Eve the curse of having "pain in childbirth" after the fall rather than having to have children period to continue the human race, possibly implying that procreation was always a part of God's plan for humanity. Ultimately, either interpretation is valid.

* Sort of the case in the universe of the novels ''Literature/AmericanGods'' and ''Literature/AnansiBoys'' with two notable exceptions. In the former, Wednesday (Odin) tells Shadow that people like him generally "shoot blanks" [[spoiler: Shadow is Wednesday's son with a human woman, but rather than being a completely new god or simply human, he is an incarnation of the God Baldr]]. The book also informs the reader in ''Literature/AmericanGods'' that Mr. Nancy (Anansi) has a son, Charlie, who is the protagonist of ''Literature/AnansiBoys'' and is seemingly completely normal. [[spoiler: His brother, Spider, who was split from him, is basically a god, although the protagonist turns out to have RealityWarper powers]]. Charlie ends up having children, who seem to be human [[spoiler: while Spider appears to be infertile]]. Possibly on purpose, considering that the mother-in-law lives within spitting distance of them.

* Pure-Blooded Devils in ''LightNovel/HighSchoolDXD'' are implied to have 10,000 year lifespans, and proportionately low fertility. After the GreatOffscreenWar caused a severe depopulation, with the [[Literature/ArsGoetia 72]] former great houses being reduced to ''three'' and remnants, this has become a serious problem. As of the start of the series, even high-ranking devils of the remaining noble houses are recruiting from humans they personally reincarnate, just to get their numbers back up and stabilize the population. Things have gotten so desperate for the devils that it's stated point-blank (in the novels, at least) that FantasticRacism has been ''marginalized'' by how dire the situation is, and even the proudest pure-blooded houses consider blood purity secondary to just surviving. The few who strictly stick to creating pure-blooded peerages are considered shortsighted and selfish by most of the population. On the other hand, StarterVillain Riser is able to strongarm the entire Gremory house into giving him Rias in an arranged marriage none of them support just by saying it's to preserve the Pure Devil race.[[note]]His exact motivations vary by adaption; in the original LightNovel, he did want the marriage for the purity and pride of the race and being married to drop-dead-gorgeous Rias was just a bonus, in the anime it's [[IHaveYouNowMyPretty the other way around]].[[/note]]

** Vampires seem not to reproduce in the usual way as they're not so much immortal as undead; they're literally dead during the day. They remain the same age as when they were turned. However, many of them assume a parental responsibility for new vampires that they have turned, and a vampire seethe acts very much like a big dysfunctional mafia family.

* The [[OurDragonsAreDifferent Kantri]] of ''Literature/TalesOfKolmar'' can live around two thousand years and are considered mature at two hundred fifty. About two hundred of them fled to the Dragon's Isle five thousand years ago and never increased their numbers. One observes with frustration that they ''should'' have increased, but the species seems demoralized and getting more so. There are fewer mated pairs and even fewer births happening all the time. It's mentioned with great concern that there have been [[DyingRace only three births in the past eight hundred years]] -- and the Kantri with their huge claws are helpless in the face of complications of birth. If a human hadn't stepped in and midwifed during ''Song In The Silence'', [[DeathByChildbirth the first birth in three hundred years would have ended tragically]]. Also, Kantri only feel the desire to have sex a dozen or so times in their long lives, and the act is difficult and painful, not fun. Mated pairs enjoy 'joining souls', but this gets no one pregnant.

** Meanwhile [[TheOlderImmortal the Valar and Maiar]] (basically, [[OurGodsAreGreater gods]] or [[OurAngelsAreDifferent angels]]) don't reproduce at all, the exception being Melian, who married an Elf (and is the ancestress of many important characters). [[WhatCouldHaveBeen They did have families in earlier drafts]], however.

** The Elves breed much more slowly than humans, because their women ovulate once in a couple of years (or even tens of years). Not to mention that after a hundred or so years, the sex gets boring. It's also mentioned they're only fertile at young age, but as later in the books a girl is bred with an elf over 500, it's probably only the women.

* In ''Series/NewAmsterdam2008''', John Amsterdam has had several children, who, unlike him, are mortal. One of these children, Omar, looks older than John himself, and knows about John's immortality. One episode shows that John keeps records of his descendants, so he can keep track of them and [[SurpriseIncest avoid dating female descendants]]. Both Omar and an elderly female descendant shown in a flashback where John is secretly dating Omar's mother are upset when John tells them that he still hasn't found his soulmate. Of course, what John means is the one woman who would cause his "curse" of immortality to end.

* Angels in ''Series/{{Lucifer}}'' live forever and can't have children. This is probably the only reason why [[LovableSexManiac Lucifer]] hasn't sired an entire horde of devilspawn. [[spoiler: Turns out there's a loophole; if an angel regards itself as unworthy of being an angel, it becomes human until it regains its self-respect, and while human is capable of having children with another human.]]

** Played with by the Dark Eldar. They can indeed reproduce, but the majority of Dark Eldar are vat-grown clones (which serve as mooks in combat or spare bodies in experiments) which are only sub-par (allegedly) in combat skill but otherwise differ little from actual Dark Eldar. Dark Eldar literally feed on pain and uses this to extend their lifespans. Asdrubael Vect, Archon of the largest Dark Eldar Cabal, is currently the oldest living being in the universe, bar the Chaos Gods and Necrons. Having natural "True-born" children is a privilege reserved for the upper-echelons of Dark Eldar society.

** But the Fast Ager Norns, who tend to evolve spontaneously in many C3/DS wolfing runs, avert this. Maturing within seconds, [[ExplosiveBreeder very fertile]], and immortal, they will easily max out your population no matter what population limit you choose. They're basically the cancer of the norn population.

* Averted in ''VideoGame/DwarfFortress'', with interesting results. Elves mature and reproduce at the same rate as humans, but have no upper limit to their ages. This results in massive populations; they could take over [[ProceduralGeneration most worlds during generation]] by [[ZergRush sheer dint of numbers]] if it weren't for two weaknesses: they are poorly armed (having only wooden weapons and armor) and they are ''[[ImAHumanitarian cannibalistic maniacs]]'' who start wars over the way other species treat ''[[AnimalWrongsGroup plants]]'', [[ViciousCycle resulting in them warring with pretty much all of their neighbors]]. Battles with ''thousands'' of elves fighting (and losing to) less than a hundred dwarves are not uncommon.
* In ''Franchise/TheElderScrolls'', the [[OurElvesAreDifferent Races of Mer (Elves)]] are much [[LongLived Longer Lived]] than their counterparts in the Races of Men. (''Exactly'' how much longer they live is inconsistent throughout the lore, and usually {{Hand Wave}}d when brought up, but there are plenty of (non-magically enhanced) examples living 200, 300, or even 500 years without it being seen as too unusual.) However, the races of Mer are also implied to have far fewer children as a result, with some sources even indicating that there may be a "cap" on the amount of children a Mer woman can have in her lifetime (with few ever having more than three). Additionally, their chances of having children are higher if they take a non-Mer lover. (For example, the Bretons are an entire race of Mer/Man hybrids who eventually outbred both of their parent races in the region of High Rock. Due to the UnevenHybrid nature of inter-species offspring in the ''ES'' universe, the Bretons are still far more Man than Mer.) This is stated to have caused a major problem for the Falmer (Snow Elves) back in the 1st Era, since they did not breed as much as the invading [[HumansAreWarriors Atmorans]]/[[HornyVikings Nords]] did. This caused peace to break down and the result was that the Falmer were driven to extinction or horribly mutated, [[spoiler:bar a few hundred individuals that did indeed survive at a remote outpost]].

** The asari, who live for one thousand years, don't seem to have a problem with this trope. They happily breed all they want to. On the other hand, in order to become pregnant, the asari has to be consciously trying to become pregnant. They can have sex all they want and only reproduce when they have a desire to. The asari, of course, are an entire race of [[GreenSkinnedSpaceBabe Blue Skinned Space Babes]], which probably rejiggers their place on the immortality vs. fertility continuum. Most of the time, the asari don't choose to procreate until they pass their 300th birthday and become Matrons, and generally don't have that many children in their whole lifetime; nearly 1000-year old Matriarch Benezia only has one daughter, for example. Aethyta, who's as old, is implied to have had a good number, but her father was a krogan.

* The [[AllTrollsAreDifferent Trow]] in {{Creator/Bungie}}'s ''VideoGame/{{Myth}}'' series were created as an entire species by the god Nyx at the begining of the world. They have no natural causes of death, are eighteen feet tall, and have bodies that are as tough as stone. For many thousands of years they dominated the world, but entropy and a series of costly wars took its course, and now [[DyingRace there are only a few hundred Trow left, if that]]. The ones that remain tend to keep to themselves, but pray you never have to [[DemonicSpiders run into one on the battlefield]].

** In addition to Cubi, no new members of the Fae race may be born until living members willingly and deliberately die. They can have children with just about anything, but, [[http://www.missmab.com/Demo/HG06.php well...]] The problem is that the fae race has only so many souls to go around, and nothing can be done to increase that number. That's why a fae has to die before a new one can be born -- the dying fae's soul is reincarnated in the newborn fae.

* ''Franchise/FullmetalAlchemist'':
** Homunculi, creatures created by alchemy, are stated as unable to reproduce. They exist outside of any ecosystem.
** Notably averted with [[spoiler:Van Hohenheim]], who is immortal and can reproduce, but this doesn't affect his children (in both the [[Anime/FullmetalAlchemist anime]] and [[Manga/FullmetalAlchemist manga]], but for different reasons).