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How does interspecies reproduction and hybrids work in your setting?

How does interspecies reproduction and hybrids work in your setting?

LeBriseurDesBucks

Humans can breed with all other humans, but not with Elves, they're too different to be able to get children together. Werewolves are interesting, it works like a curse and werewolves can get children with humans, and the curse is passed down if the woman is a werewolf, but not if the man is. Vampires don't fit in with normal reproduction.


klosnj11

Hybrid offspring are incapable of further reproduction (think mules). There is also metaphysical complications as different species have different after-lives. What happens to the rare hybrids is still up for debate.


Sakul_Aubaris

No interspecies reproduction. But depending on where you are in my sci-fi setting the view of interspecies couples can vary a lot. From completely normal and fully accepted, over frowned upon to forbidden and hunted. Depending on the local society, culture and government.


bigbogdan98

By sapient meaning the humans , dwarves and elves , yes , since they share a common ancestor are compatible with each-other and can create healty childrens known as halflings . And they came usually a mix o characteristic from the parents : The elven melanin is stronger , so a child between a human and an elves will always be green-ish , yellow-ish or gray-ish , the face will be round as humans have , compareted to the sharp almost triangular faces of the elves , the ears will be pointy but not as sharp as the elves and the eyes aren't a sure thing , some half elves have human color eyes while the other have the elven ones (yellow eyes , pale blue almost white eyes , red eyes , black eyes , strong shade of green) and around half of the physical abilities of the 2 races , will be more fast and agile than a human but not as an pure-blood elf . The same with the dwarves , only those guys are more human in nature , no pointy ears , just short and with long beards but great strenght . Other sentient creatures like the Stagmen (think minotaurs but half stag) are compatible with anyone but their own race . Then we have Izimma , a god hidding amoung the mortals , this trickster can create abnormal combinations of creatures , make them live past birth and give them to the dwarves to sell them on curiosity market . The halflings are at best ignored and at worst forced to leave , or suicide , or killed , since not every society likes them . The most famous halfling is Isandu the Black , son of a fire elemental who took the form of a human man and an high elven woman (a witch queen to be more precise) : he's tall as a high elves , with their specific shade of green eyes and long curly green hair , muscular as a human , with round face (and square jaw) and he's light skin , a very pale yellow .


christopher-reid

It entirely depends on how closely related they are (magic also comes into play since there's a shapeshifting ability in my setting). Some can interbreed and some can't.


Mad_Southron

Most species are capable of reproducing with each other, but more often than not the offspring is sterile. Humans and orcs are capable of having fertile offspring due to the two sharing a common ancestor. Meanwhile humans and elves, while capable of having offspring, end up having sterile offspring. And as for humans and huldra, despite huldra being closely related to elves, these union don't result in any offspring at all. It is believed that the only reason humans and elves are compatible at all is due to magical means by the elves. Elves are not entirely natural, having been extremely magically and alchemically augmented in their distant past- essentially becoming trans-elves. Meanwhile huldra, who are not augmented like their elven kin, are unable to reproduce with the other races simply because they aren't biologically compatible.


Ignonym

How it works is "barely". Most of the mortal races are reproductively compatible with each other (and suspected to share a common ancestor), but actually carrying a baby to term is another matter; anatomical differences between races tend to make births complicated at best and fatal at worst. Surgery and magic can ease the process, but even assuming the hybrid makes it to term, stillbirths and deformities are commonplace, as are health issues unique to certain couplings (for example, troll hybrids having jaws that aren't wide enough for all their adult teeth).


LordFesquire

I have anthropomorphized animals as my main races and was gonna nix interbreeding for simplicity’s sake then said “fuck it!” So interbreeding is possible and basically the offspring will be the same “species” as the parent with the more dominant genes. This isnt always the case, sometimes the genes are more evenly matched and the offspring could be the same as either parent.


Pipoca_com_sazom

the east lainaritic species (nurians: dwarfs, halflings, highones, litenens and ogrinoids: green orcs and fraddali) can all reproduce with each other, although litenens and orcs have problems because of the size of the child that can't be hold by a litenen mother, so hybrids of these 2 species are exclusively from a litenen father and a orc mother. For a long time the hybrids (specially orcs with nurians) were seen as inferior, they weren't accepted by any of the species, but that changed over time, in west nuria for example, the emperor of the darcean empire arraned a wedding for his son with the daughter of a orc leader, so most of the west nurian royal families have orc and highone hybrids, in new halhai, dwarf orcs aren't accepted by the dwarf population, and their parents are considered traitors, because of the "blood war" that ended recently. The nurian hybrids are possible because, even thought many scholars don't accept it, the nurians are just one species with some subspecies, and the orcs can reproduce because their ancestors were originally created by the lainaras (cosmical superpowerful spirits) as living weapons, and they reproduced with other species to create different and more powerful breeds, so the lainaritic ogrinoids are probably a mix between elder species. About the fraddali, no one really knows if they can reproduce with other species, they are rare and live hidden to the outside world, some say that they can reproduce with elves (west lainaritic), but that is a myth based on their appearance.


ta_becheli

Interspecies reproduction and hybrids exist in my universe, but they are strongly discouraged, that's because they are, as it says, different 𝘀𝗽𝗲𝗰𝗶𝗲𝘀, and as we learned in biology: different species do not generate fertile descendants. All hybrids are sterile, because of this, their lineage ends with them. This make people fear that if more and more people has interspecies relationships, sooner or later, their species gonna extinct. Well, this is a likely scenario, but almost impossible, since interspecies relationships isn't common and there's a huge awareness campaign carried out with interspecies couples and parents of hybrids warning them about all problems and difficulties them may have. Because of all these factors, hybrids are constantly victims of violence, prejudice, abuse and negligence by society. Some planets their are more accepted, in others, don't. Their also has many health problems, the more different their parents specie's, more health problems they has and may has. But, after some time of them appear, NGOs emerged to help them to stablish themselves in society and aware people about them, they offer food, psychological and health care, education and even shelter for both child and parents. However, despite all these social and health problems, hybrids are able to has a fully happy life. They usually relate between themselves, rarely between one of their halfs (for example, if one hybrid is half human, they can relate with a full human) and, if they want a child, they adopt one.


SuperCat76

Yes, they can. It is possible because the Multiverse has shattered at this world. All of the many races are technically the same. The Elves are just the version of humanity from their version of the planet in the multiverse. But there are differences in their genetics, easily seen by the physical differences, so to produce a hybrid the genetics need to line up in a way that it can allow the 2 slightly diferent genetics to merge. Basically it takes more, "attempts", before a mixed couple will produce offspring. Some pairings are more compatible than others making it easier for them to have a child. Others just wont work, either the genetics are just too diferent, or the pairing just does not physically work. For example a giant and a dwarf, the difference in size just does not work. A dwarf mother would not be able to carry the hybrid to term and a dwarf father would have other troubles. Though some of these physical obstacles can be worked around with medical assistance. Due to the way the genetics needs to line up there are only 3 forms of hybrids: * The 50-50 Hybrid: The most common. the offspring of 2 races. * The 75-25 Hybrid: The second most common. is the offspring of a 50-50 and a member of one of the hybrid's parent races. * The 50-25-25 Hybrid: The most rare. Having the genetics of 3 races line up with each other is effectively impossible. But a pair of hybrids that both share a parent race make the impossible just barely obtainable. By their shared genetics, the common parts will line up, allowing the creation of offspring. But 50-25-25 hybrids are always infertile, and don't really go through any complete form of puberty. Physical and or mental abnormalities are common but not guaranteed. And of note the offspring of a 75% Human-25% Elf hybrid and a human will for all reasonable tests be human. They may have some things that are called Transferrable Traits. Hair Color, Skin Tone, Eye Color, Some digestive enzymes. So the offspring will be human but may have Elvin hair, and able to eat Elvin food not normally digestible by humans. How are they viewed by society? Generally like people. There may be individuals who see them as unnatural, but at least in the main land I have built so far they get the same treatment under the law.


RiftSecInc

For the most part, anything humanlike can breed with each other, as can anything that is capable of perfect transformation magic (i.e. dragons). The status of hybrids depends a lot on the culture they live in. Werewolves tend to be very accepting of hybrids (that said, a werewolf 'hybrid' is indistinguishable from one where both parents are werewolves). Werewolves are also the race that crossbreeds most often (by far) and actively seek out humans to breed with. Dhampirs are somewhere in the middle. They are mortal, but live extremely long, so they neither belong fully to humanity nor to vampires. A lot of humans are wary of them, but they also have something of an antihero status in places where vampires are hated, since they are more powerful than full vampires (mostly due to having no need for blood and no weakness to sunlight). Half-orcs don't get much love. Orcs are generally considered some of the most undesirable creatures (aside from people with certain fetishes), and while half orcs have softer facial features and a slightly more humanlike skin tone, many still don't trust them to be anything more than violent brutes (nevermind that even regular orcs aren't actually like that). Half-dragons are the most rare type, since only very few dragons still exist, and even fever of those are intelligent enough to take on a human form. The most notable half-dragon is Torivan II, the current king of Nithria. Half-drakonids are not very distinguishable from regular ones. Dragonkin already range from bipedal near-dragons to mostly-humans with a tail and a few scales, so hybrids just have less draconic features and pass as the more human type.


Rhodehouse93

I thought it would be funny to have humans be mutts in my setting (since most fantasy races are just human+something else). Dwarf + gnome = human Orc + Goliath = human Dwarf + Orc = human This also applies to human relationships (human + anything = human) with the only exception being human + Orc = half-Orc because the goddess of life originated with Orcs. Elves are a special case, as they reproduce asexually (grown from trees).


IvanDFakkov

**Flame Phantom**: It goes... *wildly*. Like how us homo sapiens have DNA of other human subraces, human in FP can interbreed with other "humans" like goblins, elves and orcs, since they all belong to the Homo genus. The result is so crazy people tends to ignore it altogether, mainly because most humans now are hybrids and the concept of "pure blood" is, practically, lost. For humans x demons or demon A x demon B, with A and B being 2 different races (for example, a 9-tailed fox and a harpy), this takes the aforementioned a step further. Bullshits happens, but in most cases, they can't even give birth. If there's a baby like that, they are likely "barren", too, since the DNA and chromosome inside doesn't react so good with each others. In extremely special situations, however, they perform magical engineerings and Darwinist-like interbreeding to have better genes. Thus giving birth to creatures carrying the bloodline of those that are nearly impossible to mix. House Rurikov of the Great Novgoroussiyan Empire being the most prominent example: They are descendants of the Ein Nords, a race of giant demi-humans with the Zmey Ghidrahs, 3-headed dragons. The Rurikovs themselves are Scandinavian-origin and maintain a Habsburg-like policy in marriage that is after several generations, there will be a political marriage between them and House Olenyev, the original Zmeys. Things tend to get RNG because the Olenyevs are well-known genetic engineers *since the Middle Ages*. However, due to many problems, demons are more into same-race breeding than interspecies. They don't care about hybrids because that's just another face in their already chaotic world. Tl;dr: Forget it.


Fiora_FT_W

While there are no sapient species beyond humans in MotBW, there are two major "types" or sub-species of humans in the MotBW setting: s-types and neo-types, they were both bred for war but adhering to different philosophies: The neo-type genome was created to produce the strongest individual warriors possible, a modern neo-type stands on average 200cm (7feet) tall, with physiques both supple and muscular. s-types were implanted with a genome that was tailored to creating the most *efficient* soldier possible, the average s-type is roughly 150 cm (5feet) tall, with lithe, sinewy bodies. The logic being that even though each individual s-type is outmatched 1-on-1 by a neo-type or unaugment soldier; each s-type fielded requires significantly fewer materials to arm, clothe, and feed on average. The third type are the hybrid of the two, fittingly called h-types. On a physical level, h-types span the spectrum from expressing s-type dwarfism or neo-type gigantism and everything in between, meaning quite a few h-types "pass". Historically, s-types dominated the majority of the world, with only one ethnic group, the Souveran, being majority neo-type. Because of their rarity, association with the "Machine Mother", and imposing appearance, neo-types & non-passing h-types were heavily discriminated against by most s-type majority states, frequently demonized, enslaved, and, in one case, subjected to industrialized slaughter with the purpose of extermination.


converter-bot

150 cm is 59.05 inches


CrunkBunni

Elves, Dwarves, Humans, and Beastpeople are genetically compatible, and their children would take on genetically mixed features. Hybrid children between Dwarves, Human, or Elves with Beastpeople would result in the dominant beast half being retained with the features from the Dwarf, Human, or Elf parent showing prominently.


Vecromian

The six races in my world can interbreed. When the parents are different races, the child is almost always only one of those races, without mixing. For example, if a werewolf and a fairy have descendence, there is 50/50 for each race. If this descendent is a fairy, and they reproduce with another fairy, the descendent has 100% chance of being a fairy, because the "werewolf gene" just disappears. However, there is a very little chance (0'5% or so) that the descendence will be born a hybrid. That means they will be both races at the same time, and keep all the traits of both of them. If a werewolf/fairy hybrid breeds with a naiad, for example, the chances will be 50% naiad, 25% fairy, 25% werewolf, and a very little for a hybrid. I know this system doesn't make much sense, but I personally like it because it simplifies things a lot :p


Forsaken_Chef8204

**Tales from the Wanderer** Humans are able to breed with most if the other humanoid races because they are the common ancestor. Elves, dwarves, the various goblinoids, all mutated from human stock either through alien mutagen or magic. The result are the Halflings and their subraces. While humans are the dying race on Ruined Earth, halflings are slowly replacing them, acting as diplomats between their parent cultures to ease the transition.


seelcudoom

True hybrids aren't possible, humans can interbreed with elves and dwarves because those are just races of humans, but humans and dragons are impossible Demihumans are Humans that have been infused with the essence of another creature in one way or another(for demons and other spirits this CAN be threw regular reproduction but only if they possess a human body) giving them hybrid bodies while still remaining 100% human on a genetic level


mgeldarion

Interspecies breeding doesn't work in my worlds, both fantasy and sci-fi. In fantasy world humans, elves and dwarves are technically different races of the same species and they interbreed, but offspring is different - human/dwarf hybrids look like short humans or tall dwarves (depending on perspective), and their own children would depend on other parent - with human/dwarf/elf the child would be human/dwarf/elf, respectively, and if both parents are human/dwarf hybrid their child would be either human or dwarf. Half-elves always look like either elf or another parent (it's random, nobody knows how and why).


WallyLordofCorn

Humans, Elves, and Dwarves are capable of reproducing with each other. There is some rumor about that being true with dragons as well, but I wouldn't recommend trying. Orcs and Goblins can't reproduce with any of the previous species or each other. Hybrids aren't really a thing though. So if a human and an elf were to have a child they would either be a human or an elf. With them assuming the physical and magical characteristics of that species. They also tend to look very similar to the parent of their species. Though interestingly enough repeated "hybrid" breeding tends to result in something resembling repeated incest. Societal views on it vary quite a bit depending on the area. Which is to say I haven't done that part yet. Since you couldn't really tell they were a hybrid at first glance I'd imagine they would be treated like other members of their species. That or be seen as lesser by their species. I need to work on that.


AutumnInNewLondon

Elves, Humans, Oreylas, and Orcs share a common ancestor, but their evolutionary development was accelerated to adapt to the environments they live in, so they can basically mix freely. Dwarves, Gnomes, and Halflings are the same way but with a different ancestor than the "tall folk," so you're more likely to see dwarf/halfling hybrids than, say, a dwarf/human hybrid. The Khnouhm are basically just awakened trees and don't sexually mix with other species.


DanielHorcic

Humans are capable with breeding with most of the Unnatural Creatures (such as Witches, Shapeshifters, Werewolves, Merfolk, Sirens and in some case even Spirits or Daemons). It is possible because in truth, even though the Inquisition does it’s best to hide it, humans are biological very similar to to the Creatures thanks to to millennia of coexistence in ancient past. Hybrids of humans and Unnatural Creatures, or of Creatures themselves, sometimes share abilities and skills of the Creature who is their parent. But, it ha Denver been understood why it is so or how common/rare it is, as the Holy Inquisition and the Church of Martyrs had, and still does, destroyed any kind of evidence of inbreeding. These Hybrids, upon discovery by their one of many orders of the Holy Inquisition, or by hunters from its parent Creature species, are caught and killed without mercy as vile abomination. The only place on the continent where the Hybrids are free to be who they are, and whatever they are, is Commune of Soriac, as the Commune had abandoned the practice of hunting and instead embraced ideas of coexistence between humans and the Creatures.


DeetGeek06

Though technically different breeds of the same species, ogres and humans have interbred for centuries. Ogre genes are usually quite dominant over human genes, so the offspring of such a coupling almost always turn out ogroid. However, a few millennia of interbreeding has left today's ogres with more humanoid features while their predecesors were quite grisly in appearance and much stronger. It's a common misconception that a coupling between a human woman and ogre male is fated for tragedy, on the false premise that a human woman naturally wouldn't survive the birth of an ogre children. And though this used to be the case ages ago, ogres have since evolved to be quite small and manageable throughout birth and then take on growth spurts well into toddlerhood.


Lazulite29

In my world, the differences are simply too much. While the other races are theorized to be magically mutated humans, their bodies are simply too different. Interspecies couples aren’t forbidden, but offspring is, for the simple reason they’ll die in extreme pain 100% of the time.


whatisabaggins55

Almost all of the humanoid (or partly humanoid) races in my world share the same base primate ancestors, which I am calling protohumans or pre-humans. Over time, groups in different areas were exposed to high levels of magical energy which gradually mutated them, often causing them to take on physical traits from their environment. For example, my merfolk originated from protohumans swimming in the magically charged waters around a particular island chain, thus causing their bodies to mutate by absorbing traits from the marine wildlife in the area and giving them things like tails and gills. Eventually these magic levels subsided, preventing further mutation. The reproductive systems of all of these races are largely unaffected by the mutations, meaning that many of them can reproduce with one another. Humans, being the closest to the original protohumans, can mate with the most races, while many other race combinations simply will not result in offspring. The resulting half-breed offspring from successful mating usually either match the race of one of their parents or share physical traits from both parents. For example, a human mating with a merperson will result in a halfmer (human legs, fin-like fringes along the edges of pointed ears, a fishscale-like quality to their skin, partially webbed hands and feet, and gills on their neck that allow them to breathe underwater). Different types of half-breeds are viewed differently by society. An orc-elf half-breed (which I **still** cannot think of a name for) wouldn't be seen as a big issue to your average human society, but to elves and orcs (who have a long rivalry due to their shared history), such unions are often seen as treasonous and deeply offensive.


LukXD99

Well, except for one, all of the intelligent species in my world are humans or descendants from humans, and even though their differences are a bit bigger than races, they are still closely enough related to each other to interbreed. Hybrids are somewhat common and usually accepted in most parts of the world, but they do tend to have lower survival chances than most other species.


NishWick14

I do have interspecies breeding in my world which has produced some hybrid species 1.Bloodwolves- vampire+wolf hybrid Bloodwolves are wolf dominant hybrids which came into origin at the end of cold repllere period, where a vampire king conceived 3 wolf children with a wolf lady named Kristinia who was taken as a slave during the attack on the last wolf village South of flammand mountains. So eventually they grew ans after many sagas of their own they finally have the flammand territory in control in the modern world with being one of the richest noble families of Zen kingdom 2. Amazonian strigois- vampire+garuda hybird Amazonian strigois are vampire dominant hybrids who were created by a vampire who landed on a garuda quarantine island and saved the dying people by using his power to give fertility to the last of remaining eggs of them, the children that came out were a totally new species with detachable and regentatable wings and a bloodlust. They evolved in the next 200 years into a culture with exceptional naval technologies.


Dragonsbane777

Not only can most species not procreate together, my game world has no half elves or half orcs!


smekras

The ones that can without outside assistance do so because of shared ancestry and genetics that are still compatible enough. Hybrids are quite rare and generally viewed as odd, though not necessarily ostracised (in most cases). For the rest, like Terrans, celestial involvement was required to bridge the gap between fae and hominids. Given that literally all Terrals (except maybe ten people) are hybrids, it is the norm and nobody really cares.


EtherealGears

My high fantasy setting runs on magic, but more specifically it runs on medieval logic, with the Christian elements carefully cut out. Anything can theoretically breed with anything, and there are many tales of fantastical hybrid animals, though few have actually been seen. As regards the Vaesyn, the "fey" of my setting, the gnarled people of the woods and mountains, they can interbreed with humans but, then again, in the eyes of many northeners, they are no more or less alien from themselves than some of the more exotic-looking human ethnic groups from the far south. It's all relative, I suppose.


neohylanmay

***The Arm*** Simply put, it doesn't. Humans, Folúpása, Askarrans, and Naieiae are completely separate species to one another and thus offspring between any two cannot happen. Sure, it all works the same down there across them all (with some minor variations — both Askarrans and Naieiae lay eggs rather than give birth to live young for instance), and they can... certainly try — and no doubt there have been examples in the past, present, and future — but a hybrid between any two is impossible.


RommDan

One could imagine that with enough genetic engineering and artificial wombs the production of hybrids could be possible.


neohylanmay

Possible yes, but I think even this far on, general ethics would stop it. Plus, while the four main races are friendly with each other, they each kind of have their own reasons to not engage in any interspecies romantic relationships; Humanity being critically endagered, Folúpása being new to the scene and thus still testing the waters, Askarrans are dealing with their own incredibly slow population growth... Really, the Naieiae are the only ones doing fine, but if the others don't want to, you can't really fault them for respecting the others' wishes. And even in the best case scenario for all concerned, I don't think it would be a technology any of them would pursue. And it's not like other options would be/are already out there — donors, adoption, etc..


RommDan

That sounds like a good setting to place a love story between 4 members of each race who have to fight against prejudice in order to live happily together.


Manifest_Author

Reproduction between two different species is impossible, and interspecies relationships are considered a paraphilia that’s looked down on by humans and aliens alike, to the point “xenofucker” is a common insult


RommDan

That's sounds like a horrible place to live lol


CreeperTrainz

Well I’m my world it isn’t inter species and rather inter subspecies. The two subspecies, the Talons and the Aldreans, are both technically the same species and can reproduce, despite their DNA appearing to differ quite a lot. Their offspring share a mix of their features and genetics and generally are no different from normal humans. As of the time of my story, there is only one half Talon half Aldrean.


pugglebaby

Cat-eyes/devils and Incubi can technically reproduce, but it is extremely difficult for a mother to hold a baby and it often results in miscarriages and still borns. Because of that, it's extremely taboo to even be attracted to someone of the opposite species. The Cat-eye monarchy has taken this taboo to the extreme and has even made it illegal for Incubi to live in their territory. The Incubi, though, haven't made Cat-eye immigration illegal and in some parts of the country Cat-eyes are accepted with open arms. The taboo is also a lot weaker there.


Affectionate-Memory4

Unfortunately humans and nekonians can't naturally have a child together. This hasn't stopped people from trying though. Hybrids aren't possible without some serious gene editing and a donor. Interspecies relationships do still happen though, and almost all of those that want children adopt, as there's no guarantee with gene editing and it's an expensive process to do safely. Interspecies relationships are treated differently depending on where you are in the system and who you are around. Some people completely accept them and others are very much against it. Generally they are accepted more places than they aren't, as it really isn't that big of a deal if Jim from upstairs is dating an alien.


elfugoKoovin

Either mix wich is rare, or full breed of one the parents while still resembeling the the other parent some way. Each race holds an impossible law breaking ability(except humans), example gobilins can see in the dark without acctually having the biological eyes for it if his son is full human his son will possess his abillity. since the world has many people dying the chances of having twins are at 25%. In the case how twins come out they can very different from eachother one can be full father while the other can be mixed. Humans can reprodue with Gobilins, Elves, Giants, Fairy, Aquinian, Avian,


elfugoKoovin

Orc, and Draculi(basically a counterfit version of devil/angel). Everyone is considered Human but just a different race, and European Homosapian is considered a different breed compared to an African Homosapian.


seaberry78

My sapient humanoid races can't interbreed. They don't share a common ancestor and are not related at all. The non-humanoid ones can't reproduce at all. They are completely asexual as they were produced artificially for war in the beginning (although they are 100% biological). Now that those means of production are gone, their numbers can only wilt over time.


Inflatable_Bridge

Hey, I asked that not too long ago ​ Anyways, if ... reproduce, they will make: ​ * Araen + human: A semi-raen, with a chance of the attributes of the Araen parent passing down. They can be recognised by having either only the long spider-legs on their backs, or only the mandibles around their mouth. * Human + herund: Never done before, humans are much too vain to do it with their historical mortal enemy. * Herund + araen: While the semi-raen will be able to reproduce themselves, the he-raen will be sterile. It's very rare for this kind of relationship to form though, due to large cultural differnces between the two races.


Phaeneaux

Reproduction in my world depends on various things, as there are only humans. 1) The woman that is to give birth has to be magically capable of sustaining life - this is an optional characteristic, as it only applies to the Bluebloods and Bloodroyals, the Purebloods still are capable of mundane reproduction. 2) RH is a factor that determines the capacity to allow reproduction at all. RH+ women can reproduce with everyone, but RH– women can only reproduce with RH– men. Curiously, Bluebloods and Purebloods are the only estate with RH–, and Bluebloods are medically known for being exclusively RH–. The RH– factor comes from the fact that lacking this protein enhances magical performance, giving at least twice as much proficiency with magic compared to RH+ magicians peers. 3) The Holy Architect's will. The Holy Architect(me) is my world's version of god, and it's up to him to allow reproduction. This is reflected in the fertility rates between married couples to not married couples, the difference between these group is incredible. Married couples can reproduce almost whenever they want as long as they pray to the Holy Architect for it, both for being gift with child or for stop the fecundation. Meanwhile not married couples show total infertility, and even praying doesn't solve the problem. Only marrying under the eyes and in the churches of the Holy Architect can solve it.


Skhenya2593

In The Cycle of the Fire, prymians can reproduce with Galcans. The offsprings are known as Halfbreeds, and they are capable of using the power given by their Sign if they are wearing clothing infused with Virinium. In Calimore, however, is a bit more realistic, since the mix between humans and Fey folk can give offspring as well, but the offspring will usually be sterile, and they are marginalized by society.


1MorEGOD_REJECTED

Apologies for the text wall, tell me what you guys think For the Trahnvad, a combination of being made up of roughly the same stuff, and developing in such a way similar to humans that they're somehow biologically compatible, but since they're larger, and have four arms, a human female would fucking die trying to birth a Trahnvad, a female Trahnvad would have to birth the hybrid, and the hybrid has a significantly lower fertility rate. For the nyltiac sevir, a combination of evolving from parasites, and gene modification, they have made two different types of sex organs for the 'progenitor'(these types can 'impregnate' compatible entities with a flea sized worm-like thing[I don't know what else to call it] inject into the foreign entity via a syringe-like proboscis, they'd usually inject it at somewhere close to the digestive system, when done to a human like entity, it's usually common for them to inject at the navel region. Once the 'egg worm' completely integrates with the impregnated entity, the impregnated individuals original reproductive system is consumed, and is replaced by a one way reproductive system. Lets say, if you were impregnated by a progenitor, regardless of your original gender, you'd have your vag/dick replaced by an equivalent to a vagina, though it only naturally opens when the birthmother, well, starts birthing. Now the second genital for a progenitor[I nearly forgot to mention that their penises are located in the mouth area, and their heads shape has the combined features that of a cuttlefish, and a squid] is a thin, tongue like genital that ejaculates a copious amount of spermatophores into the 'entry point. A human, for example, has this entry point protruding from the original navel, and the womb is in the middle of the intestines, this does make it hard to surgically reach into the womb without damaging anything else though. A progenitor is made asexually, but an emissary is made sexually[an emissary lacks the ability to make a birthmother, but has the penis tongue and is birthed at a 'fast pace'(and the built in gene repair mechanism makes it to where the spermatophores from a birthmothers offspring won't make a faulty offspring, disgusting yes, but the nyltiac sevir can perform incest with the birthmother to make an emissary without having to worry about genetic related issues oddly enough. Also, the regenerative factor makes it to where that all off the nyltiac sevir are basically biologically immortal and retains their youthfulness). But they also have a bullishit mechanism that makes it to where if you cut off a chunk of them, or even so much as make them bleed, and if nothing sterilized it, then it'll make a growing tumour mass that grows like a fungal mold, and anything compatible with the nyltiac sevir will be able to be infected by eating this mass, breathing in the spores, or consuming anything with the nyltiac sevirs genetic material, but not only do you become biologically immortal, and are able to regenerate any part of your body overtime, but they still treat you as kin. Oh and the nyltiac sevir also have organelles in their cells that can receive, produce, and send radio signals to any of their kin within range, thus enabling a sort of psuedo telepathy since they can also broadcast their thoughts. They can even do so with anything that can receive, produce, and/or send radio signals(you can use your phone to communicate with them once at the right frequency, though the nyltiac sevir can produce a wide range of frequencies, so it might not be that difficult to communicate with them. And the flesh tumour can also do this, thus theoretically increasing the sensory range of the nyltiac sevir dramatically).


Aromaster4

All of my humanoid species share a common ancestory, their all hominds similar to that of the real world humans like Neaderthals and Homo Sapians, Ethonors and Grimari are the most closely related outta all of the hominds, and interbreeding was quite common amoung those during the Klassicas ages (basically late antiquity). Its only when Humans try to mate with species like the Htar that may or may not be difficult, since they are the most distent.


Bryggyth

Usually it doesn’t work out. Even though some of my groups descended from the same ancestors - for example, elves/dragon-people or humans/cat-people - it has been such a long time since then that they have diverged too much to have hybrid children. They can still have relationships or course, it’s just not normally possible to have children together. However, pretty much anything is possible with a bit of magic, so you can still sometimes find hybrids in rare situations.


tehZamboni

There's a few human sub-species that can interbreed - even if they don't consider each other "human" - but other combinations don't work even if seemingly physically compatible. Hybrids are extremely rare and few survive for any length of time. There's also a limited number of compatible species for that kind of hanky-panky. Halflings are infected human children, elves are genetically incompatible from a different tree, and dwarves are elemental beings. (No shapeshifting dragons, either.) There are far more artificial "hybrid" beings than natural ones. None of the major societies would accept hybrids. Most of them view each other as abominations, so there would be few places for a hybrid to survive in either society unless isolated and protected. There are rumors of organizations using hybrids for use as infiltrators in border regions, but these stories are often dismissed or suppressed.


TheBeetle2

Well mortal races can’t cross-breed, but Demonic enteties can. All demons are the most powerful mortal being of their multiverse (long, LONG, Story), and they can change their biology slightly. This almost exclusively occurs with demons of similar appearence, such as Blue Baron, the demon of greed, and Feyr, the demon of fear, who both have an insectoid appearence. Even though both identified as a male entity, Feyr took on the maternal role. And their off-spring evolved into Joteoids and Biteoids, two types of more primitive insect species of the planet Teoid. Joteoids were thin and spindly like crane flies, and Biteoids were large and bulky, like beetles, and they were coated in a diamond exo-skeleton This happens because A: Most beings of similar appearence are likely based off the DNA of creatures from the homeworld of the gods. Both Baron and Feyr are based on Archteoid DNA, the ancestors of all insects and arachnids and the like. And B: because demons are horny, impulse lacking beings, and if you resemble something like their own species, they’ll change their biology for you Hybrids are seen as what they are, Demon spawn There are also hybrids between mortal beings and gods, but those aren’t recognised as hybrids. At best they’re Demi-gods, at worst they’re just slightly less powerful gods


LordSyrenzo

**Alvelotyl - Halfbloods** ​ * **The races of Alvelotyl are broadly broken up into ten categories, known as the** [**Ten Racial Classifications**](https://www.reddit.com/r/worldbuilding/comments/li0iks/special_racial_classifications/gn23ps6?utm_source=share&utm_medium=web2x&context=3)**. Among these classifications are the Tierakin, also known as** [**Beastfolk**](https://www.reddit.com/r/goodworldbuilding/comments/jw6une/tell_me_about_your_animalpeople/gcq3ufx/?context=3)**, which themselves are divided into three categories.** * **Oldbloods are Tierakin that don't have visible 'Human' skin or many recognisable Human features.** These beings are often somewhat Humanoid in shape, but would never be mistaken as a Human. This can include; Inura, Nekari, Lapin, Gnolls, Orcs, Rodens, Croakers, Nagas and many others. * **Newbloods are Tierakin that do have some sort of visible 'Human' skin or features.** This can include races that have Humanoid upper halves and animalistic bottom halves, or Humans with animalistic features. This can include; Merfolk, Satyrs, Centaurs, Serpine, Lamias and many others. * **Halfbloods are a difficult group to categorise. They can fall into either category, but tend to fall into the latter the majority of the time.** Halfbloods appear when a Tierakin race has a child with a non-Tierakin, resulting in children that tend to share some of their features. ​ * **Halfblood, sometimes referred to as 'Four Ears' in a derogatory sense, is the name given to any creature born from the union of two races that doesn't have a concrete 'people', or 'stable' race.** Halfbloods are often born to a Human parent, as Humans are by design an adaptive species, one with Souls malleable enough to procreate with other races not of their own. * **While the child is forming in the parent's womb, both the body and Soul take aspects from both parents, shaping what they become.** For Halfbloods, they tend to take some traits from one parent or the other, but are often predominantly one species with traits taken from the non-dominant parent. Due to the nature of Human Souls, they are often the 'dominant' parent in these unions, with very few races boasting a more 'dominant' and adaptive Soul during formation, with Goblins being one of those few. * **Halfbloods that have had 'stronger' mixes of both parents, and are common enough to happen that they might breed with one another can result in the formation of new races** altogether, which is theorised to have happened with some of the Newblood races, like Satyrs, with some non-Tierakin races like Goliaths and Darklings also following this principle. * **In rare cases, a Halfblood might form from two parents of the same race.** This can occur when the influence or genes from an ancestor of another race comes to the fore, resulting in a Halfblood child. This can often cause confusion or distrust between the parents, disowning the child as 'cursed' or unusual, or leading to a distance between parent and child based on physical, mental or magical differences or expectations. ​ * **In cases where a couple of differing races don't seem to be compatible with one another, they can choose to visit a \[Childbringer\].** \[Childbringer\] is an Advanced version of the \[Fleshmolder\] Class, and is a Caster with Shapeshifting Magic that specialises in assisting infertile or incompatible couples bring a child into the world. This job is often dangerous for the child, and can be viewed as unnatural, artificial or 'tainted' by outside parties, but has been done on a number of occasions. During these situations, a surrogate of the dominant parent's race may be used to house the child until birth, but only on a physical level, as their Soul will still have been formed, preventing any of their Aera from altering the child's growth and Soul composition. * **Some Halfblood variants are common enough to have nicknames in some regions,** with the most well known being the 'Nekamimi', or 'Cat-Eared'. ​ * **Due to the hybrid nature of Halfbloods, they can have wildly different features from one another, standing out amongst the crowd.** In some conservative communities, this can be grounds for discrimination. This treatment is far more common in Oldblood communities, with Newbloods being far more accepting as a whole. * **These features can sometimes result in Halfbloods being confused for Chimeras, or beings that have been magically fused or altered in some way.** Since Chimeras are treated with far more wariness due to their oftentimes unstable or artificial nature, this can sometimes extend to Halfbloods with more unorthodox appearances.


Dragrath

In my settings I generally opt to divide groups culturally rather than by species so hybrids aren't generally a thing as a whole separate category but you can get some populations with more of what are historically racially distinct features that are heritable. In WAS(World Against the Scourge) for instance one idea I'm debating implementing is having a population of people who are descended from an ancestral population which had experienced insular dwarfism in the distant(to human timescales) but not so distant(on geologic timescales) past who have naturally shorter stature. Because of that there is a bit of a compatibility issue between both groups which lowers fertility generally. This mismatch basically means hybrid insular dwarf people for current lack of a better word can only naturally be born with a human as a mother as the reverse is fatal to both mother and developing child on the rate cases where an embryo does implant. Female hybrids also tend to be close to sterile due to their immune system typically rejecting implanting embryos. Other than that and one other setting where elves humans and dwarves are related hominid species with low but nonzero compatibility all my other examples are fully incompatible due to very different physiology morphology and psychology. That said in settings like Conflux or WAS(World Against the Scourge) the production of hybrids via artificial means is doable. As most such magics are underdeveloped these will typically not live very long if at all. On the other hand the Faye have a much more insidious biomolecular control via their genomic magic meaning they probably could make a viable hybrid in principal but the Faye have no interest or even a similar enough cognition to even think of trying something like that as it is too alien of a concept to them given they like all Hymenopterans determine sex characteristics via Haplodiploidy with male drones being glorified sperm packets used largely for genetic information exchange and bartering between individual hives. The closest you can get is changeling but they are the result of a modified queen best described as a specialized gene snatcher/collector injecting one of her modified eggs into a developing embryo resulting in the embryo incorporating the otherwise nonviable modified drone larvae into their somatic tissues of the host species where it records and or controls gene activity through development and life cycle. This is effectively limited to the hosts somatic tissues particularly focused around the nervous system so changelings are still biologically their parent species for any reproductive function but they technically would contain both human and Faye cells and thus could be considered a form of unnatural hybrid though a sleeper cell parasite would be a much better description.


8129299292

Life in my world is split into three categories: flora,fauna, and sapiens. Sapiens can interbreed with any other sapien races, including races not from there own world.


Foolster41

My world has Lizardfolk, Humans and Catfolk. They can and do sometimes have sex with each other, but hybrid children aren't possible.


Minecraft_Warrior

When it comes to zombies and humans it’s like a coin flip, sometimes they would be human like and other times it would be zombie like. One thing that is consistent is that the aging of a human and aging of a zombie would combine and the halfbreed would have immunity to all dangerous potions


JohannesdeStrepitu

The answer to that question for my fantasy setting is none of the above, since I've rebuilt the biology of the setting from the ground up according to Aristotelian and Platonist explanations of how living things work. Breeding between two organisms of different species only requires the compatibility of their natures (their essential traits or what traits are natural for members of those species). Since the nature of a thing, whether the thing be living or non-living, is what makes it become what it is supposed to be (that is, acquire the properties that define a thing of that kind), these natures need to be compatible for a new organism to even start to come into existence within inanimate seminal/ovarian fluids. One way for this to happen is for the essential traits of one species to just be *more* than the essential traits of the other (as is true for many mortal/intelligent species who might try to breed with humans). There are some further details there involving alternate Aristotelian chemistry, metaphysics of properties, and cosmology/theology that go into how conception itself works but that compatibility of natures gives the gist of what makes interbreeding possible in the setting.


Darth_T0ast

Its completely impossible. Not everything has the same systems of genes, and have different DNA equivalents. The only common factor is two sexes, and egg laying. Its impossible, although serious attempts have been made.


TubbyFatfrick

This is a curious topic... Just as the Exavian Empire is a curious race. Let me explain. The Exavian Empire is made up of, obviously, Exavians. Exavians are essentially androids, usually with the consciousness of a human. Due to them being androids, they cannot reproduce sexually, although they CAN have sex solely for pleasure... However, thanks to the miracle of the hyper-futuristic, Exavian technology, asexual reproduction is more than possible. First, the child's consciousness is generated, through the creation of an AI. Then, using immensely powerful computers, advanced nanotechnology, and some very anomalous materials, the child's body is simulated, and built. Then, once everything is assembled, the child is ready, and has the intelligence of an infant... Then again, that is expected. Due to the child's body being pre-fabricated, and as customizable as Create-A-Sim, this negates the chances of birth-defects. Of course, the child has the ability to modify their bodies at will, once they reach the age of 18 years, relative to Earth. However, this raises some concerns about the concept of parents treating their children as an accessory, rather than an individual. As such, all Exavian citizens must pass a specific test, and receive a permit, in order to have a child. Regardless, the concept of having a child that develops no birth defects, and is able to be customized completely, raises some interesting ideas about morals. Ideas such as, "If there is no risk of complications, specifically regarding birth/mental defects, is there any really such a thing as a Gene Pool, in Exavian Society?" Long story short, so long as all the paperwork is correct, incest is entirely legal, within the Exavian Empire. Not only that, but inter-species breeding is legal and surprisingly common. As such, only an outsider would consider such sights to be unusual. Then again, using the term "Species" to define intelligent alien races, or otherwise, is somewhat of a bad idea (The term "Species" refers solely to animals, while the term "Races" refers to aliens, 'n whatnot)… although, some of the unique species' of the Synaverse have been anthropomorphized, such as the "Exonigus," a sort of harmless Slime, comparable to that found in eastern media (eastern on earth).


Belantine_Crow

Elves can have kids with pretty much anything. If the Elf is the mother, then the child will be born in the Elf way, which is somewhat similar to an egg. If the Elf is the father, the child will be born in whatever way the mother's species reproduces. Half-Elves are always fertile Humans can have kids with most races that give live birth, though, depending on the other race. A human mother might not survive. Half-Humans may be sterile, it depends entirely on the other race Esarfa are very different, they don't reproduce like anything else. Instead they "infect" another species. If they infect a female, she will fall pregnant and give birth to a new Esarfa in a mere two weeks, the new Esarfa will inherit some traits from whatever race the mother is. If they infect a male, the next time they have sex, the infection will completely leave them and "transmit" to the partner, continuing, absorbing certain traits until it reaches the mother. Where it again takes only two weeks. Esarfa halfbreeds retain the the "infection" Changelings can have children with anything. Half-Changelings are always fertile


THACC-

While it is somewhat legal for humans to marry Axolotls in some places, they can’t technically reproduce.


Someones_Dream_Guy

So far theres only humans and cloned humans that can reproduce. And it works same way as regular humans. Since nobody is insane enough to stick their dick into crabspiders or AIs-those reproduce by other means.


ComplexNo8986

Anything with compatible dna can mate, so a human and a minotaur can have a kid though it’s a coin flip how the genetics will manifest down the line. My world is an animist world where something as simple as a rock can awaken as a spirit. Spirits and humans can mate if the spirit is “compatible” with one another. If a human and minotaur mate the hybrid could wind up with horns or the muscularity of a minotaur but retain more human traits since minotaurs are half human. If they mate with a spirit then that child will appear with some sort of trait from the spirit 100% of the time such as rocky protrusions, bark like skin, fiery red eyes, gills, etc. as well as inheriting an innate connection to nature and thusly a talent for magic.


mrtollman50

Humans and scalies, despite the fact they're mammals and reptiles respectively, can create hybrid offspring that is reproductive. One explanation could be that the two species have the spark of Zakka's divine magic. These hybrids are what make up the Auraikan race, on the continent of Auraika. They first appeared 10,000 years ago, and essentially became my world's equivalent to Europeans (Auraika even bares a resemblance to Europe, but very much has its geographic differences).


Jealous_Activity_849

none all of them come from alien planets so far we've got \-humans - no explanation needed \-botanyons - a race of tall three eyed dark grey bipeds with cloven "hooves" that reproduce by rubbing their backs against each other to swap spores \-unevmonas - a pinkish purple centaur shaped species that evolved from amphibians that reproduce with human like bits but don't have like compatible "sperm" \-glyphleotides -a humanoid race of stone creatures born from a special glyph casted on a cube of stone, they can mildly shapeshift the stone to like have a "peg or a hole" but it would feel to good on the account of yn being stone, :ps their only magical their is absolutely NO biology taking place to keep them alive at all


healyxrt

In my word, the races differences don’t make them anatomically incompatible and the most extreme differences are equivalent to the differences between Homo sapiens and Neanderthals, who we were able to reproduce with. The differences are usually in height, skin color, hair color, and the addition of certain fantastical traits like long ears, bigger eyes, skin with different textures than humans usually have. In some places where two territories start to overlap you get people who are very clearly mixed and over time become their own sort of race. Magic ends up being one of the most distinguishing features, since it’s usually reflective of the environment the race live in and can serve to exaggerate certain physical features, customs, beliefs, and abilities. One example is a race that is relatively short with slight frames, silvery hair, pale skin, and blue and green eyes. They live in a damp forest area and have been suffering from inbreeding, because their religion holds racial purity as important. The problem is that there are a lot of physical barriers between their small community and other groups of the race, but not between them and the typical humans.


Parallax_Eclipse

Interspecies reproduction is possible, but not between all species. Varians, Vaar, Kiyans, and Illixe can all interbreed, but are incapable of reproducing with humans. Beyond this, all hybrids are sterile due to variation in gamete production genes. Hybrids usually combine traits of both species involved, as hybridization usually requires some form of genetic engineering. Hybrids involving Illixe DNA or Vairan DNA tend to be easier to make for an unknown reason. Hykqin can only reproduce with themselves, and the same goes for Antarans. Synthetic species like Draconiir and Nanosynths reproduce asexually via code-scrambling, and are incapable of standard reproduction. ​ Hybrids are seen like anyone else in society by most factions, except the Hyqkin Federal Enclave.


The_Beatlemaniac909

Humans, Vampires, and Demons all share a common ancestry, so intermingling and hybrids are fairly common. For more exotic species like Satyrs, Cervitaurs, and Gatons it's a bit more complicated. Hybrids can and have existed but the odds are far lower and most interspecies lovers dont try it.