A pregnancy that goes from conception to birth at an extremely fast rate, often caused by an external (possibly supernatural) factor.

In ScienceFiction, this is often because of some other hugely advanced race knocks up a different one, possibly a human, and the hybrid offspring gestates at an enormously fast rate, either normal for the other species, and grows to term in a matter of days. Or, if it's created like a robot, the creation is sudden and wasn't announced in previous episodes, and the whole process takes a very short time.

This is sometimes just when WritersCannotDoMath or they are using ComicBookTime or WebcomicTime and lose track of what the hell is supposed to be happening.

Tends to go hand in hand with {{Fetus Terrible}}. Contrast with LongestPregnancyEver. Not to be confused with InstantBirthJustAddWater, which is where the woman's pregnancy takes the usual forty weeks but her labor and (especially) delivery are implausibly quick. Also, please do not confuse this with InstantHomeDelivery, which has nothing to do with birth.



* [[https://vimeo.com/12784545 This commercial]] depicts several women spotting a cute baby, causing them all to grow big pregnant bellies as a result.
* In [[https://youtu.be/oHNSDMMwsg0 this advert for Steri Stumpie]], a young boy is telling his mother the urban legend which states that if a mother and son drink Steri Stumpie at the same time it will cause them both to get [[FountainOfYouth ten years younger]]. The mother doesn't seem to buy it, but they both take a slurp simultaneously regardless. Mom looks in the mirror and notices that she's grown more youthful so she turns around to check on her son, only for him to be gone and his drink to be spilled on the floor. Looking down, she notices that she now has a big pregnancy bump, to which she responds with a sigh.

[[folder:Anime and Manga]]
* In ''Anime/DeadLeaves'', Retro and Pandy have sex, and she is visibly pregnant roughly ten minutes later; Not long after that, the baby just kind of... comes out of its own volition, but ages super fast and dies in short order.
* {{Fetus Terrible}} Yuca Collabel from ''Manga/ImmortalRain'' resurrects himself in a pregnancy that lasts little more than two months...and is already in the form of a prepubescent boy when he bursts out of his mother's stomach ala ''Aliens.''
* {{Subverted}} in ''Manga/{{Berserk}}''. Casca gives birth to a demonic FetusTerrible mere days after being raped by Femto, leading Guts to believe this trope is in play and attempt to kill it. Skull Knight corrects him: the creature is not Femto's child, but ''Guts''', conceived some time before. The demonic rape mutated the unborn child and caused something between a premature birth and a miscarriage; it's unclear which because it's unclear whether the child is "alive" in the conventional sense.
* Played with in ''Manga/KouchaOuji'', there was a pregnancy that lasted not even a month. It's because the whole thing happened in the Tea World where time flows about 10 times slower compared to the human world while the mother was a human so her body's own time was still bounded to its true course. So technically while the event was extremely fast to the Tea World and its natives, the pregnancy itself actually processed on normal speed from a human's perspective.

[[folder:Comic Books]]
* Happened to ComicBook/MsMarvel in a fairly {{Squick}} inducing storyline in ''ComicBook/TheAvengers'' in the MarvelUniverse.[[note]]Squick for her and for the audience, but originally a occasion of mirth and rejoicing for the rest of the Avengers -- including Beast offering to sit in as a living teddy bear for the resulting child -- until Carol explains what happened to her and gives the Avengers an epic WhatTheHellHero speech.[[/note]]
* In the Creator/DCComics, one member of the China's Great Ten is Mother of Champions, whose entire super power is her ability to go from conception to birth in three days. She also gives birth to [[ExplosiveBreeder litters]] of kids with SuperStrength and who [[YoungerThanTheyLook age ten years for every day they're alive]].
** If she mates with one of her teammates, the offspring have other superpowers, as well - though in the case of the radioactive Socialist Red Guardsman's children, the birth was painful unlike any she'd had before.
* In the aftermath of {{Creator/Marvel}}'s ''Comicbook/CivilWar'', Tigra discovered she was pregnant by the Skrull impersonating Hank Pym. She disappears shortly after Norman Osborn takes power without so much as a baby bump, reappearing in time to take part in the Siege of Asgard. Afterwards she reveals that she'd already given birth to a son, William, in the time between her escape from Osborn and her joining the battle there. Handwaved with a throw away line about her race of cat people having two month gestational periods.
* When Rahne from ''ComicBook/XFactor'' reappears at the team's hq she looks about seven months pregnant [[spoiler: leading poor Rictor to believe it's actually his child]] while she's actually only been pregnant for several weeks. This is explained in a throwaway line by her child being a hybrid of semi-god magical wolf and a werewolf-esque mutant human and with wolves having an average gestation period of two months.
* The Dark Destroyer in the second ''ComicBook/AtariForce'' comic book series pulls this on a backwater planet creature that he enters into to become born in the form of Martin Champion, speeding up the process to the point where it ends up killing the mother.
* Happens in ''Comicbook/ThePulse'', but not to an extreme degree. Jessica's enhanced genetics mean that she ends up delivering a healthy, full-term baby at only six months.

* [[MrSeahorse Dib's pregancy]] in [[http://www.fanfiction.net/s/2133003/1/Where_Do_Smeets_Come_From this Invader Zim fanfiction]][[spoiler:which depending on the ending you choose to believe, may or may not be an actual pregnancy]] borders on LongestPregnancyEver. In-universe, the pregnancy lasts only a week, yet due to, WebcomicTime, the pregnancy would have appeared much longer if you were reading it while it was being updated.

* ''Film/AbraxasGuardianOfTheUniverse'' has the evil alien Secundus impregnating a woman, who not only gives birth in a matter of seconds, but ''doesn't even get her pants off''.
* It is natural for alien hybrids in ''Film/{{Species}}'' to mature inhumanly fast. In ''Film/SpeciesII'', they do it so quickly, they quite literally go out with a bang.
* In the Creator/RobinWilliams film ''Film/{{Jack|1996}}'', the title character is born rather improbably, and quite unexpectedly, at 10 weeks' gestation; this reflects his 'four times normal speed' growth rate.
* In ''Film/TheIcePirates'', Karina is revealed to be pregnant just as the spaceship enters the time-warping zone. She gives birth to and ''raises'' her son in just a few minutes of screen time.
* In ''Film/{{Prometheus}}'', Dr. Shaw, abiding the LawOfInverseFertility, gives birth within hours of getting pregnant. In that case, her partner was [[spoiler:under the influence of AppliedPhlebotinum, and the result was a ''giant'' proto-facehugger]].
* The new Warlock in ''Film/WarlockTheArmageddon'' is born when a Satanist preaches to the Devil. To her horror she becomes massively pregnant within minutes and gives birth to a black, slimy ''thing'' which quickly morphs into Satan's new minion and kills his "mother".
* ''Film/TheLordsOfSalem'': Due to the whole MindScrew GainaxEnding nature of the whole film it's unclear if what is seen actually took place. During the gathering and visions in the theatre at the end, [[spoiler: Heidi becomes pregnant, comes to full term, and gives birth to the Anti Christ in, from our perspective, a few minutes.]]
* Either an extreme version of this trope this happened in ''Film/AddamsFamilyValues'', or Morticia decided not to tell Gomez until the last second and didn't show at all.
-->'''Morticia:''' Marvelous news: I'm going to have a baby...right now.
** Well, the end of the first film did show her knitting a baby onesie with three legs, so it's implied they were aware. Still, she doesn't look at all pregnant in the five minutes of film before the baby is born.
* In ''Film/IntoTheWoods'', the Baker's Wife instantly becomes eight or nine months pregnant the moment the curse is broken.
--> '''The Baker:''' That was quick!

* Diana's pregnancy in ''Literature/{{Gone}}'' develops at an accelerated pace, probably because the baby in question is a mutant.
* [[spoiler: Bella's]] pregnancy in ''Literature/{{Twilight}}'', due to [[spoiler: the baby's father (Edward) being a vampire]]
* From ''Literature/DuneMessiah'', Chani's twins come to term superfast [[spoiler:as a side effect of the Spice. [[DeathByChildbirth She dies afterwards]].]]
* In the ''Literature/WomenOfTheOtherworld'' universe, [[spoiler: Elena's pregnancy only lasts five months, due to her being a [[OurWerewolvesAreDifferent werewolf]]. Somewhat unusual in that neither Elena nor her mate suspect anything unusual about her being as large as a fullterm pregnancy at only five months--Elena complains frequently about the inconvenience. Their cluelessness is justified since she's the first known female werewolf and thus she's having the first werewolf pregnancy. The ExpressDelivery is explained as splitting the difference between the duration of a typical human pregnancy and a typical wolf pregnancy.]]
* Occurs in two Creator/ChristopherPike novels - ''The Grave'' and ''Literature/TheLastVampire 4: Phantom.''
* Done artificially to heroine [[BrokenBird Morn Hyland]] in ''Forbidden Knowledge'' from ''The Gap Sequence.'' The pirate who was holding her prisoner was irritated that her pregnancy was making it hard for him to rape her. ([[TakeThat Why yes, it is a Stephen Donaldson novel. How could you tell]]?)
* [[spoiler: BJ]] gives birth to her daughter Laurel in Nick O'Donohoe's ''The Healing of Crossroads'' after a three-month gestation. [[spoiler: This is because Laurel's father is a [[FaunsAndSatyrs faun]]; they [[YoungerThanTheyLook mature quickly]].]]
* In ''Literature/TheCaliforniaVoodooGame'', a loa-spirit in the tournament adventure impregnates [[spoiler:Mary-Martha]] and its offspring grows to full term over the course of a few dozen hours. Subverted in that the semi-divine fetus changes its mind at the last minute and decides to stay put, inverting this trope into the LongestPregnancyEver (possibly permanent).
* In Creator/AnneRice's ''Literature/{{Taltos}}'', the Taltos grow faster if the woman in question is aware of her pregnancy and sings to them while being pregnant; this happens within a few minutes at one point. They also age superfast once actually born, becoming adults and able to have their own children within minutes. This leads to a very squicky scene in which a newborn Taltos [[spoiler: is forced to impregnate its own mother before it is promptly burnt alive]].
* [[Literature/{{Dragons}} The Last Dragon Chronicles]]: [[spoiler: It does not take long for the quickened bronze egg to turn into a baby. Too bad Gwilanna turned him from a perfectly normal (well, for a Pennykettle) boy into a dragon.)]]
* ''Literature/TheKharkanasTrilogy'': The second book, ''Fall of Light'', has Sandalath be raped by [[spoiler:Lord Draconus' power repository that has become corrupted by too much evil in its vicinity and taken on a humanoid form]]. Due to the assailant's supernatural state, Sandalath goes through ''several'' pregnancies in a row which each take mere moments from conception to delivery until something capable of life is produced. Contrary to expectation, the result is not a FetusTerrible, but a somewhat weird looking but otherwise sweet child with a case of [[RapidAging accelerated aging]].

[[folder:Live Action TV]]
* ''Franchise/StarTrek'':
** Deanna Troi has an express-lane pregnancy courtesy of a passing energy being in the ''[[Series/StarTrekTheNextGeneration Next Generation]]'' episode "The Child".
** Bajoran pregnancies only last five months, even if the fetus happens to be a human that was transplanted because of an emergency. Such was the case on ''[[Series/StarTrekDeepSpaceNine Deep Space Nine]]'' when the O'Briens' second child was transplanted into Kira after an accident.
* "The Alpha Child" in ''Series/{{Space 1999}}''.
* Taken to extremes in ''Series/GarthMarenghisDarkplace'', when a man is raped by the mutated eye-ball of a sex offender and then [[MPreg immediately gives birth]].
* On ''Series/XenaWarriorPrincess'', Gabrielle carried and gave birth to her FetusTerrible in one day.
* In the second episode of ''Series/{{Fringe}}'', Our Intrepid Heroes were called in to investigate the case of a woman who got pregnant, reached full term, and gave birth in around fifteen minutes. The offspring died of old age in a half hour. The father was part of a government experiment and would also age very rapidly [[spoiler:and ultimately did]] without regular doses of pituitary hormone. Oh, and the woman? She died.
** This case gets called back in season 3, when [[spoiler:Alt-Olivia's pregnancy is accelerated to delivery in a few days as part of Walternate's master plan.]]
* Aeryn Sun does this in the ''Series/{{Farscape}}: Peacekeeper Wars'' miniseries. {{Handwave}}d by her saying that soldiers of her species are genetically designed to become pregnant and come to term in a matter of a week or so and give birth in minutes (not to mention the part where a pregnancy can be in stasis without growing for up to ''seven years''--my, but that military is efficient). It being a [[HalfHumanHybrid crossbreed]] between herself and the human John Crichton, labor to birth takes an incredibly long time--about half an hour at most.
* Combined with MisterSeahorse in the ''Series/RoundTheTwist'' episode "The Big Burp". Pete becomes pregnant by holding hands with a dryad after peeing on her tree. After an accelerated pregnancy, he gives birth through his mouth while [[ChainedHeat handcuffed to his worst enemy]].
* In ''Series/TheYoungOnes'' episode "Cash", Vyvyan [[MisterSeahorse (male)]] appeared to go from conception to term in less than 24 hours. [[spoiler:The [[SubvertedTrope "baby"]] turned out to be just a lot, ''a lot'', A LOT of [[{{Fartillery}} trapped gas.]]]] [[MakesJustAsMuchSenseInContext It's just that kind of show.]]
* ''{{Series/Angel}}'':
** Happens to Cordelia (and several other women) in the season one episode "Expecting."
** And again when [[spoiler:possessed!Cordelia is pregnant with [[PhysicalGod Jasmine]]]], though this one lasts at least a few weeks or possibly months in-story.
* Sort of invoked in ''Series/{{Torchwood}}'', when [[spoiler:Gwen is implanted with an alien's egg the night before her wedding and looks about eight months pregnant by morning. The egg is removed before it hatches, however]].
* Tess in ''Series/{{Roswell}}'' after sleeping with [[spoiler:fellow E.T. Max, which leads her to push the alien quatuor to leave the Earth, whose atmosphere is (supposedly?) suffocating the fetus.]]
* On Series/MyHero, an Altron pregnancy apparently lasts only six weeks.
* In both ''Series/BeingHumanUK'' and ''Series/BeingHumanUS'' Nina and her American counterpart Nora experience accelerated pregnancies of about twice the human rate of fetal development due to the fetus being a werewolf/half werewolf respectively.
* In season one of ''Series/{{Riget}}'', Dr. Petersen's pregnancy develops at a frighteningly fast rate. In the finale, she gives birth, [[spoiler:to a fully-grown man.]]
* ''Series/{{Soap}}'': Corinne has only been married a month but her doctor says she's five months pregnant. She swears she didn't have sex with anyone else during the four month mystery period but her husband doesn't believe her. She gives birth just a few weeks later; turns out the baby is a devil-child.
* Speaking of [[SoapOpera soaps]], they often do this if they want a child's birth to occur during a sweeps period or special occasion (Christmas, etc). Ex. ''Series/OneLifeToLive'''s Luna gave birth in May, despite announcing her pregnancy the previous December, meaning she was either already 3 months pregnant when she made the announcement, or that she gave birth prematurely.
* In an episode of ''Series/{{Charmed}}'', Phoebe has a nightmare that this happens, but it was AllJustADream.
* In the ''Series/{{Haven}}'' episode "Ball and Chain", Beatrice Mitchell would involuntarily transform into a beautiful woman named Helena. Helena would seduce and sleep with a random man, then change back to Beatrice. Beatrice would then get pregnant and give birth in a day of two, while the father suffers RapidAging. Beatrice's grandmother did something similar, but suffered DeathByChildbirth bearing Beatrice's mother.
* ''Series/TheThundermans'' reveals that superhero pregnancies are very quick in the episode "A Hero is Born" , about a day. In one scene, a normal Barb discovers she is pregnant, goes to the kitchen and comes back out about a minute later looking nine months pregnant.
* Vicky Dubcek on ''Series/ThirdRockFromTheSun'' sleeps with the Big Giant Head in one season finale and mentions that she might be pregnant the next day. She steps out of the room and comes back looking six months pregnant. Then she goes into labor a few minutes later. Oddly enough, the resulting baby is normal.
* ''Series/{{Amen}}'': Thelma went from announcing her pregnancy to not only being ready to deliver, but being two weeks overdue within a few months.

* When Tucker in ''Machinima/RedVsBlue'' gets turned into a MisterSeahorse by an alien, he gives birth to "Junior" in a very short amount of time.

* In the ''Music/{{Abigail}}'' album by Music/KingDiamond, Miriam becomes pregnant and gives birth to the FetusTerrible Abigail in the same day.
* This happens repeatedly in the music video for Chromeo's "When The Night Falls" via DistractedByTheSexy. However, it becomes FanDisservice/possible horror in a hurry, but turns out to be [[spoiler: AllJustADream]].

[[folder:Tabletop Games]]
* ''TabletopGame/DungeonsAndDragons'' has the [[BlackMagic Corrupt Conjuration]] spell "Searing Seed", introduced in Magazine/DragonMagazine #300, later appearing in ''The Book of Vile Darkness''. If the victim fails to resist it, they become instantly pregnant -- even if they're [[MrSeahorse male]] -- with a FetusTerrible that is a half-fiend clone of the victim. This monster goes from conception to [[ChestBurster violently tearing its way out of its host-mother's stomach]] in 1D3 rounds. That's 6 to 18 ''seconds'' for non-D&Ders. It then grows into a fully mature adult within a round of being born. It also has a particularly psychotic case of CloningBlues, causing it to be obsessed with killing its parent/original, if they survived the birth. And they might not; the victim takes an incredible amount of damage from the trauma, even more if male, seeing as a male body isn't physically designed for such a thing.
* In ''TabletopGame/{{Pathfinder}}'', the [[MotherOfAThousandYoung Drakaina]] is a Mythic tier Aberration whose thematic powerset revolves around spontaneously impregnating herself -- or any victim she can get her tentacles on -- with rapidly growing, horrific, randomly mutated spawn.

* In the final number of jukebox 80's musical ''Theatre/RockOfAges'' [[spoiler:Sherrie goes into labor and gives birth in the Bourbon Room bar]] in under 25 seconds during a guitar solo. Add in an unknown DeliveryGuy out of the strippers and metal heads present onstage, and the angel of [[spoiler:deceased character Dennis presiding over everything]] for an AwayInAManger feel.

[[folder:Video Games]]
* The hack of ''VideoGame/DigDug'' called ''Baby Maker'' involves a naked man having sex with naked women underground. The sexual experience makes the woman plump up really quickly. At the end, a baby explodes out of the stomach. [[http://www.youtube.com/watch?v=1lnWhcW2Mr8&feature=channel Dude sure is fertile.]]
* The DS-only sequel to ''VideoGame/{{Okami}}'', ''Okamiden'', stars Chibiterasu, Ammy's son, and Susano and Kushi's son. Not so remarkable? The second game takes place ''nine months'' after the end of the first.
** [[spoiler: Kuni is adopted, this is made explicit after the end of chapter one, and Chibi is a demigod, same rules don't apply.]]
** The game hints that Ammy shifting the BalanceBetweenGoodAndEvil by defeating Yami is the cause of Ammy and all the other brush gods having children.
* ''VideoGame/DragonQuestV'' sees your hero's wife going through this: depending on how quickly you play through the plot, she can go from marrying you, to confirmed pregnant with your children, to having said children, in a matter of hours... or only a few in-game days.
* Normally, a pregnancy in ''VideoGame/TheSims'' takes 3 Sim Days (3 hours of normal gameplay.) There exists, however, a cheat that allows you to reduce the pregnancy to less than 1 Sim Day.
** In fact, there are mods that allow a female sim to give birth ''right after she gets pregnant''
** Justified, considering the length of an actual pregnancy would be longer than a sims entire life.
* Most ''VideoGame/HarvestMoon'' games have you wait 60 in-game days (two in-game seasons) from the announcement of the pregnancy until the birth of the child. Not ''Animal Parade''. Exactly seventeen days after your spouse remarks, "If we're going to have kids, we've [[GettingCrapPastTheRadar got our work cut out for us]]", the child is born. And the second one only takes ''fourteen days''. Even in Harvest Moon time [[note]]1 month = 1 season[[/note]], that's equivalent to a month and a half. [[RuleOfFun But who wants to wait two months to see their kid, anyway?]]
* ''VideoGame/RuneFactory2'' and ''[[VideoGame/RuneFactory3 3]]'' have 15-day pregnancies. ''1'' and ''Frontier'' make you wait a reasonable amount of time.
* In ''VideoGame/BaldursGateIIThroneOfBhaal'', a romance with Aerie leads to a pregnancy that is rushed through within the storyline of the expansion, which is unlikely to take more than a few weeks of game time. Even slightly more absurd than by real-life terms, because she's an elf, and the pregnancy should take a whole year. There's no in-story reason for this, nor is it acknowledged. (Some have suspected [[AlternateCharacterInterpretation Aerie of lying about not having been with any man before the]] PlayerCharacter, but that would make just as little sense simply for the reason that then she would have been very visibly pregnant already for a long time.) It is possible to play through the whole plot before the baby is born, hiding the timeline absurdity from view.
* In ''Franchise/{{Pokemon}}''
** Kangaskhan are born pregnant. Or at least in-game they are as when breeding Kangaskhan, the eggs contain the mother and a child.
** The way Pokémon works is an example as all you need to do is put a male and female of compatible [[HotSkittyOnWailordAction Egg Group]] together in the Daycare/Nursery and walk for a bit. Depending on whether the Pokémon are the same species or have different trainer I.Ds, eggs can be produced extremely quickly and in large numbers. Eggs hatch depending on the amount of steps you take, but this "waiting period" can be decreased as well. This can lead to a net increase of ''well over 100 offspring or more'' in a single breeding session.
* In ''VideoGame/FireEmblemFates'', female characters get married, pregnant, give birth, and have their children grow to young adulthood in the amount of time it takes to end an S-Rank conversation and exit your castle. The children growing up rapidly is justified by growing up in pocket dimensions where time moves faster, but the rest goes [[GameplayAndStorySegregation unexplained and unmentioned by the story]].
* In ''VideoGame/DragonAgeOrigins'', a male noble dwarf player can have sex with a [[GoldDigger noble hunter]] and her friend before he gets drafted into the Grey Wardens. When he is exiled and returns to Orzammar later on, one of the women will have already given birth to his son. While officially speaking the game takes place over the course of a year, if a player leaves Ostagar and makes a bee-line straight for Orzammar, at most a few weeks will have passed.
* Elizabeth in ''VideoGame/BioShockInfinite'' is supposedly the miracle child of Columbia's prophet Zachary Hale Comstock, and is said to have only spent seven days in Lady Comstock's womb. [[spoiler:What actually happened was that the sterile Comstock kidnapped his own AlternateSelf's daughter from another timeline.]]

* In WebComics/{{Shortpacked}}, Leslie and Robin use some AppliedPhlebotinum provided by [[MadScientist Joe]] to [[HomosexualReproduction have a child together]]. At first Robin only goes along with the plan if Leslie is the one to carry it, but Joe points out that Robin has SuperSpeed and by his calculations could gestate a child in only three weeks. She eventually agrees. [[spoiler: Literally seconds after her water broke, she pushed her triplets out right in the middle of store.]]

[[folder:Truth In Television]]
* [[http://en.wikipedia.org/wiki/Marsupial Marsupials.]] They have a placenta, just like eutherians (placental mammals), but it's formed differently, so that its connection is weaker. Birth therefore happens in about 2-4 weeks, and the baby is still very small and embryonic. It makes its way up to the mother's pouch and continues its development there.
* Aphids (the little white insects you sometimes see eating your rose bushes) are literally born pregnant.