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Q&A

Posts tagged reproduction

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Q&A Why haven't scientists found evidence of humans interbreeding with aliens?

In my alternative universe, Atlantis was a real city that existed, although it wasn't called Atlantis or founded by humans. Atlantis or rather, Dosham was a city on an isolated landmass in the nort...

5 answers  ·  posted 2y ago by Arbiter Elegante‭  ·  last activity 2y ago by Arbiter Elegante‭

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Q&A Through Uterus/Reproductive System

Early life, and many modern organisms have what we call 'blind guts'. Food enters and exits via the same opening. However, that is inefficient and has been widely replaced with 'through guts'. Fo...

4 answers  ·  posted 2y ago by Aezyc‭  ·  last activity 2y ago by Aezyc‭

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Q&A Genetics and Population Dynamics of a 7-sex system

One of the respondents in this thread suggested a 7-sex system with the following features: An idea I came up with years ago was a variation on the male/female/carries-offspring idea. This spec...

3 answers  ·  posted 2y ago by Ettina Kitten‭  ·  last activity 2y ago by Ettina Kitten‭

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Q&A Could a species be able to be impregnated by anything?

Is there a way for a species to essentially become a living incubator of sorts? Not the other way around, as in Plausible ways for the alien species to be able to impregnate every and any species?,...

3 answers  ·  posted 2y ago by FelisMiscellaneous‭  ·  last activity 2y ago by FelisMiscellaneous‭

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Q&A Could Reptiles Be Simultaneous Hermaphrodites?

Reptile reproduction, it turns out, is more flexible than our own. Whiptails, a girls-only species, can lay unfertilized eggs without the need for a male. And Komodo dragons have recently been di...

3 answers  ·  posted 3y ago by JohnWDailey‭  ·  last activity 2y ago by JohnWDailey‭

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Q&A How can I force siblings to fight each other for the privilege of being born?

When Lilith was kicked out of the garden of Eden, she was forced to fend for herself in a harsh, unforgiving world. Lost and alone, she came upon a bloke named Satan. Their love produced two childr...

5 answers  ·  posted 3y ago by Incognito‭  ·  last activity 3y ago by Incognito‭

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Q&A Why might a vampiric race have low birthrates?

This pure-blood vampiric race is not immortal, but their lifespans are about five times that of mortals. This race has lived in a vast city beneath a small mountain range for thousands of years (th...

6 answers  ·  posted 3y ago by P. M. B.‭  ·  last activity 3y ago by P. M. B.‭

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Q&A Would the human population increase without ''natural sexual discouragement''?

I read a theory once which stated that the natural pain, sickness and general discomfort that humans can experience during sex, pregnancy, and childbirth help control the human population by discou...

2 answers  ·  posted 3y ago by JordanTheCynic‭  ·  last activity 3y ago by JordanTheCynic‭

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Q&A What would be a plausible mechanism for conception involving an arbitrary number of gametes?

I am attempting to devise a mechanism whereby a species may reproduce in a communal manner. A number of individuals, ranging from two to arbitrarily high, may contribute gametes to a mass spawning ...

5 answers  ·  posted 6y ago by Anonymous‭  ·  last activity 3y ago by Anonymous‭

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Q&A What configuration would provide the most protection for a male dragon's reproductive organs against mechanical and chemical attacks?

Dragons awesome (that's why sub-par writers and DMs use it as a substitute for an actually engaging story/setting) but they're still just animals, animals that reproduce. Besides it's painful to g...

3 answers  ·  posted 3y ago by Mephistopheles‭  ·  last activity 3y ago by Mephistopheles‭

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Q&A To what extent is it feasible for this race to be majority female?

In my world there is a race of humans who are disproportionately female. They are closely derived from and very similar to real-world humans, but are unable to interbreed with the other races as th...

6 answers  ·  posted 3y ago by Maddock Emerson‭  ·  last activity 3y ago by Maddock Emerson‭

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Q&A Would it be feasible to determine whether or not a humanoid species is fertile in less than a week?

So, as one of the many, many consequences of modern day humanity being given access to a runic magic system by an unknown party, nearly the entire human race discovers one morning that they've been...

1 answer  ·  posted 3y ago by Jason Clyde‭  ·  last activity 3y ago by Jason Clyde‭

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Q&A Physical causes of multiple births in humans?

The setting I'm building has a race of people, derived from modern humans, whose primitive survival as a species relies partly on very fast reproduction, and I think I want them to have a tendency ...

1 answer  ·  posted 3y ago by Maddock Emerson‭  ·  last activity 3y ago by Maddock Emerson‭

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Q&A Size of a litter for a carnivore with a high rate of death

So, I'm designing an alien race/civilisation of carnivore. I was thinking of a very aggressive specie, who is both the alpha predator of his world and his own main cause of death. Basically, a lo...

3 answers  ·  posted 3y ago by sab‭  ·  last activity 3y ago by sab‭

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Q&A How would a 4th trimester affect human development?

Newborn humans are born in a very undeveloped stage compared to other mammals. This is because if they stayed any longer in the mother, their head would become too big to fit through the birth cana...

4 answers  ·  posted 3y ago by Incognito‭  ·  last activity 3y ago by Incognito‭

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Q&A Where are all the non-aquatic mouthbrooders?

Some fish mouthbrood. Some amphibians mouthbrood. Crocodilians carry their babies in their mouths to water. Is there a reason why there are no instances (that I know of) of terrestrial animals that...

5 answers  ·  posted 3y ago by aadv‭  ·  last activity 3y ago by aadv‭

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Q&A What could a reptilian race tell by candling their eggs?

I've got a D&amp;D-inspired setting, and one of the races present are yuan-ti. They're sentient snake people with a variety of forms, ranging from mostly human-looking to basically just a giant tal...

5 answers  ·  posted 3y ago by Ettina Kitten‭  ·  last activity 3y ago by Ettina Kitten‭

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Q&A Would having more than two sexes decrease the number of individuals required to have a sustainable population from a genetic perspective?

On a world made up of many small islands, each island cannot support a very large population. Although sometimes individuals from one island make it across the ocean to another, this is usually a ...

5 answers  ·  posted 3y ago by Michael Stachowsky‭  ·  last activity 3y ago by Michael Stachowsky‭

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Q&A Should immortal women have periods?

Mod Note: Some people may be squeamish about this subject, please keep all responses clinical rather than vulgar. So, in my world, I try to play the "immortality" trope with twists that make it su...

20 answers  ·  posted 6y ago by Zoltán Schmidt‭  ·  last activity 3y ago by Zoltán Schmidt‭

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Q&A What would prevent chimeras from reproducing with each other?

There exists a polymerization spell that allows distinct animals to combine with each other, creating an entirely new creature. The beasts in question are held in transumutation circles linked by l...

7 answers  ·  posted 3y ago by Incognito‭  ·  last activity 3y ago by Incognito‭

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Q&A Elf-like race: What could prevent overpopulation?

For an elf-like race whose people do not age beyond physical maturity (the accumulated DNA damage associated with aging does not occur), what would prevent overpopulation? This elf-like race is f...

25 answers  ·  posted 4y ago by JustSnilloc‭  ·  last activity 3y ago by JustSnilloc‭

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Q&A What kind of environment would favor hermaphroditism in a sentient species over regular, old sexes?

I'm trying to create alien species that is hermaphroditic, with strong sexual conflict. In essence each being tries to trick or force (by mechanical or hormonal means) its partner to take role of f...

6 answers  ·  posted 3y ago by Zjerzy‭  ·  last activity 3y ago by Zjerzy‭

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Q&A Speculative Biology of a Haplodiploid Humanoid Species

In haplodiploid sex-determination system, female/diploid individuals are developed from fertilized eggs by means of sexual reproduction, while male/haploid individuals are developed from unfertili...

2 answers  ·  posted 3y ago by H. Hayashida‭  ·  last activity 3y ago by H. Hayashida‭

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Q&A How could a same sex couple have children?

In my current work, I want same sex couples to be fully integrated in society. As it is set in a medieval fantasy world, survival of the human species relies on having children, so same sex couples...

12 answers  ·  posted 3y ago by Thanie‭  ·  last activity 3y ago by Thanie‭

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Q&A Is a naturally all "male" species possible?

The Orville has Mochlans, an (almost) all-male species. They reproduce in some unexplained method that produces a fertilized egg. The issue here is that if one of the mates lays an egg and the oth...

12 answers  ·  posted 3y ago by Beefster‭  ·  last activity 3y ago by Beefster‭

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Q&A How can a long lived species that reproduces slowly prevent themselves from going extinct?

We Eldar are a beautiful race that have a maximum life span of 500 years. We are stronger, faster, more intelligent, sexier, and frankly just superior to you humans in every way. However, we cannot...

4 answers  ·  posted 3y ago by Incognito‭  ·  last activity 3y ago by Incognito‭

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Q&A How could a female member of a species produce eggs unto death?

As far as I am aware, female mammals cannot produce eggs (as in ova) after a certain age/maturation. How could the female produce eggs for an unlimited amount of time, resulting in a 'queen' mamma...

6 answers  ·  posted 3y ago by A Lambent Eye‭  ·  last activity 3y ago by A Lambent Eye‭

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Q&A Plausibility of this Zoonotic(inter-species) Reproduction Method

I've answered a few questions with this process but I wanted to see if I could bounce/refine this off the communities more biologically adept members. Basically, it goes like so: As a means o...

3 answers  ·  posted 5y ago by anon‭  ·  last activity 3y ago by anon‭

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Q&A Could you engineer a baby for a same sex couple?

Kikazaru and Protogon have been fierce rivals in the designer baby industry/artificial wombs since time and memorial, but Kikazaru is looking to finally best its rival by introducing a new scheme: ...

4 answers  ·  posted 3y ago by Celestial Dragon Emperor‭  ·  last activity 3y ago by Celestial Dragon Emperor‭

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Q&A How long would gestation period be for dwarfs?

Dwarfs are intelligent creatures, with stronger bones and muscles but smaller than humans. They live mostly under ground (caves, mines, etc.) and reproduce sexually. How long the gestation period w...

2 answers  ·  posted 4y ago by Edward Constantin‭  ·  last activity 4y ago by Edward Constantin‭

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Q&A Russian Dolls - How do they reproduce?

Warning picture showing dissected Russian Doll My theory I believe that Russian Dolls reproduce asexually. They are born pregnant. At the time of birth, the outer doll dies. What is now th...

19 answers  ·  posted 4y ago by chasly from UK‭  ·  last activity 4y ago by chasly from UK‭

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Q&A Lego world. How do they reproduce?

It is difficult to find statistics for the ratio of Lego men and women in the general population but from a non-scientific survey, I get the impression that Lego men vastly outnumber Lego women. Ye...

9 answers  ·  posted 7y ago by chasly from UK‭  ·  last activity 4y ago by chasly from UK‭

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Q&A Egg Geometry--Shape of Eggs in Oviparous Humanoids

What shape would the eggs of a species of oviparous humanoids be? Eggs are common enough that you'd be hard-pressed to find someone who hasn't seen one. While birds' eggs are often thought of more...

3 answers  ·  posted 4y ago by Pleiades‭  ·  last activity 4y ago by Pleiades‭

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Q&A How can I maintain the demigod powers of my clan while ensuring the purity of its bloodline?

We, the house of Habsburg, are a royal family that descend from the gods. Our founder, Cersei Habsburg, conquered Europe and brought peace and stability to the dregs of the continent. After taking ...

8 answers  ·  posted 4y ago by Incognito‭  ·  last activity 4y ago by Incognito‭

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Q&A Why would a species require multiple inseminations in order to reproduce?

The Eldar are a psychic species with a similar body design to humanity within a galaxy-wide empire. They are far more advanced than other races, technologically and philosophically. Eldar have a st...

5 answers  ·  posted 4y ago by Incognito‭  ·  last activity 4y ago by Incognito‭

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Q&A How can a planet full of zombies reproduce and maintain its population?

How can we have a world that is inhabited only by zombies and yet continues to be populated? For the purposes of this question, I envisage the type of zombie that has been infected by a virus, is...

6 answers  ·  posted 4y ago by chasly from UK‭  ·  last activity 4y ago by chasly from UK‭

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Q&A How can I alter humans to allow them the ability to choose the sex of their child in the ancient world?

Research shows that some creatures in the animal kingdom manipulate the sex of their child in order to maximize the number of grandchildren. Parents in good condition, based on health, size, domina...

4 answers  ·  posted 4y ago by Incognito‭  ·  last activity 4y ago by Incognito‭

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Q&A Pangenesis and alien life

Darwin's hypothetical mechanism of inheritance was called pangenesis, whereby the body continually produced particles of information - gemmules - which aggregated in the gonads, and that that the o...

2 answers  ·  posted 4y ago by SealBoi‭  ·  last activity 4y ago by SealBoi‭

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Q&A Pros and cons of hermaphroditic vs sexual species?

Between a species that is hermaphroditic and a species that has males and females, then what would be the pros and cons of either one from a biological standpoint? Anything not regarding the biolo...

6 answers  ·  posted 4y ago by Dead Knight‭  ·  last activity 4y ago by Dead Knight‭

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Q&A How can a one-gender humanoid species reproduce quickly?

Theoretical scenario question I came up with. Unrelated to anything, just a weird idea. A humanoid species has evolved to appear to humans to be a human female. In fact they have bat-like wings wh...

4 answers  ·  posted 5y ago by C. R. Yasuo‭  ·  last activity 4y ago by C. R. Yasuo‭

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Q&A Is it plausible to make human gametes from different parent chromosomes?

I'm creating a near future world where laboratories could create human gametes (sperm &amp; ova) using chromosomes from different people. So theoretically we could take 1st chromosome from a 1st pe...

3 answers  ·  posted 4y ago by DoubleHelix‭  ·  last activity 4y ago by DoubleHelix‭

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Q&A Bioengineered reversible sterility

The Humern empire is vast, unbelievably powerful and (in certain matters) brutally authoritarian. One such issue is that of reproduction. In order to ensure that all subjects of the Empire remain ...

5 answers  ·  posted 4y ago by Joe Bloggs‭  ·  last activity 4y ago by Joe Bloggs‭

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Q&A Why would an entire biosphere evolve to reproduce with three parents instead of two?

So I have an alien biosphere in which trisexual reproduction predominates. As far as we can tell, trisexual reproduction does not offer an advantage when it comes to shuffling genes. The biological...

4 answers  ·  posted 4y ago by Anonymous‭  ·  last activity 4y ago by Anonymous‭

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Q&A Plant-Animal reproduction

I'm designing an Anthropomorphic Lu-pine. (Get it? Cuz it's technically a tree, but it looks like a werewolf.) They are mobile, omnivorous plants, slightly larger than the average person. They are ...

1 answer  ·  posted 4y ago by ZoneWolf‭  ·  last activity 4y ago by ZoneWolf‭

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Q&A Supporting Larger Litter Size In Rabbit-Women With Minimal Deviations?

I had an idea for a race that is humans alchemically fused with various animals. One of the sub-varieties is rabbit-people, who have the famed bunny fertility. How might the bodies of the women be ...

2 answers  ·  posted 4y ago by Preg-Fan‭  ·  last activity 4y ago by Preg-Fan‭

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Q&A Realistic Shapeshifter Attempt

Imagine a sessile, multi-cellular slime like organism (or whatever necessary) awaits in a burrow or along a tree branch. Then an animal lands in its ooze and is trapped and soon paralyzed by its ve...

1 answer  ·  posted 4y ago by Thalassan‭  ·  last activity 4y ago by Thalassan‭

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Q&A Are reproductive and excretory systems inherently linked? Could life evolve differently?

As far as I have been able to determine, the majority of life reuses the same plumbing for reproductive and digestive/excretory systems. In fact, the anus is believed to be derived from the male go...

4 answers  ·  posted 4y ago by Anonymous‭  ·  last activity 4y ago by Anonymous‭

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Q&A Plausible cause of a family only giving birth to females?

I had an idea about a lineage supposedly cursed so that the women only give birth to more women, but I'm thinking that some outside force purposefully mutated/altered their DNA to cause the effect ...

21 answers  ·  posted 4y ago by Preg-Fan‭  ·  last activity 4y ago by Preg-Fan‭

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Q&A How does a female-to-male adaptor impregnate?

A hypothetical species reproduces by females impregnating males a la seahorses. However, their reproductive system appears woefully ill-suited to this task. Their genitalia are outwardly similar to...

3 answers  ·  posted 6y ago by Anonymous‭  ·  last activity 4y ago by Anonymous‭

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Q&A Hydras as parasitic-mating, polyandrous amphibians?

This is the second question in a series about my ongoing worldbuilding project, which seeks to explain the evolution and biology of various fantasy creatures. The first one was: Is petrifying visi...

3 answers  ·  posted 4y ago by SealBoi‭  ·  last activity 4y ago by SealBoi‭