Crossovers
- Child of the Storm:
- Unintentional and incredibly poorly timed with Steve and Peggy Carter, who only slept together once, only shortly before the mission where Steve was presumed to have died. This resulted in a daughter (disguised as a sister), and in the fullness of time, two grandchildren and several great-grandchildren. While it was so early that only Doctor Strange knew and there was nothing he could reasonably have done even if he had known, Steve feels guilty for having left Peggy in the lurch - and being physically and mentally in his late twenties, has a fair bit of mental adjusting to do after he finds out at the end of Child of the Storm.
- Ironically, the exact same thing happened with Minerva McGonagall and Bucky, resulting in a rather notable grandson - Clint Barton (who, after initially being perturbed, takes it rather stoically). The ironies and improbabilities are lampshaded.
- Unintentional and unwanted happened with Wanda having accidentally got pregnant by John Constantine when she definitely did not want a child - or at least, not one by Constantine, resulting in Hermione. However, it's ambiguous how much she'd have been bothered if she hadn't found out that he'd spectacularly betrayed her trust over the matter of the Zataras. While her enemies would have been a massive problem, having someone to turn to might have made her more open to the idea.
- Pepper being pregnant with Tony's baby during the latter half of Child of the Storm and the beginning of Ghosts of the Past, was also unintentional, though both she and Tony seem very happy to be parents.
- Nicholas and Perenelle Flamel wanted a child but couldn't have one. Fury dangled the possibility of one under their noses as an incentive to take the Infinity Formula (which is described as essentially healing and rebooting everything) and work for him after they destroyed the Philosopher's Stone, to Dumbledore's disapproval. It worked and in chapter 66 of Child of the Storm, Perenelle is noted as being visibly pregnant.
- Jonathan and Martha Kent, as per canon, couldn't have children, thanks to Martha being infertile. Cue Clark. In chapter 60 of the sequel, Strange gives them a cure he'd rather easily mixed up, allowing them to make Clark a big brother if and when they wish to. As he explains, Clark is now more independent, so he requires less constant attention (meaning that any other child wouldn't be neglected). Jonathan, cynically, asks why he didn't try and use it to buy them off in the first place. The answer? "If you had needed paying, you would not have been worth the price."
- Micaiah and Sothe tried to have a baby in The Tainted Grimoire. However, Vaticus arranged for Micaiah to be poisoned, resulting in a miscarriage and Micaiah becoming infertile.
- In the Kith And Kin Series, England desperately craved a biological child of his own after finally growing into an Empire, only for his attempts at colonization to fail to thrive for a long time, driving him to adopt several other personifications. He's overjoyed when he learns he actually sired America and starts heavily doting on the boy, partly because America's birth was premature and left him small and frail — the perceived Parental Favouritism causes not a small amount of drama in the family.
Grandmaster of Demonic Cultivation: Mo Dao Zu Shi / The Untamed
- Hou Yue in An Acceptable Arrangement is both under a great deal of pressure as wife to a great sect leader to produce an heir for her husband and really wants to be a mother herself. Naturally, by the time the fic has started, she has only gotten pregnant three times after ten years of marriage and lost all of them.
- Jiang Yanli in call it what you want has only slept with Jin Zixuan four times by the time they split. She finds out she's pregnant right after he's left her to find himself.
- Burning Down the House
has this happen to Ron and Hermione. To add insult to injury, Harry and Ginny have sex without a condom once and Ginny gets pregnant. - The Choices That Make Us: The first time that Regulus ever has sex, with a girl who was believed to be sterile, he gets her pregnant.
- Misery Loves Company: No matter how hard Hecate and her late husband tried, they couldn't conceive a child even with her magic. She gets around that problem by brainwashing Gaz to become her new child.
My Little Pony: Friendship Is Magic
- Of Lilies and Chestnuts: Fleur De Lis had to put her dreams of having an adorable little filly of her own on hold for years due to her modeling career, and once she's finally settled down with Fancy Pants and secure in her upper-class social standing, she naturally finds out she can't conceive a child. After Fancy Pants comforts her through a few days of depression, they look to adopt a child, which results in an excitable teenage bat pony crashing into their lives.
- Used both ways in Myths and Birthrights. Fleur desperately wants to be a mother, only to discover she's infertile. Meanwhile, Rainbow Dash, who wants to pursue her racing career, gets magically pregnant against her wishes.
- Beautiful Monster:
- Stu and Didi's planned and wanted pregnancy with Tommy ends in stillbirth. Their pregnancy with Dil (which was presumably unplanned but also wanted) ends on a much happier note.
- Despite not wanting kids, Betty becomes pregnant anyway after an unknown assailant rapes her during her evening jog. However, she gets an abortion soon after finding out.
- Played straight in the Series Fic This Citadel is Truly Blessed for every couple except Mikazuki and Kogitsunemaru. Getting pregnant was a shock for them for obvious reasons, but they are for all intents and purposes Happily Married and Good Parents to the resulting children. Then, in the sequels, you have:
- The severely depressed Souza getting pregnant and not knowing whether it's by the longterm partner he just broke up with or the one-night stand he had as a reboundSpoiler ...
- Kasen and Shokudaikiri desperately wanting a child after learning it's possible, but having difficulty conceiving and suffering a miscarriage the first time they finally do, and conversely...
- Izuminokami and Mutsunokami not being the least bit prepared for a child, and the former being repulsed by pregnancy and having the maturity level of a teenager, but accidentally getting knocked up anyway.
Unsorted
- In Touhou MAMA, infertility (assuming she's attempted to have children) is suggested to be the possible source of the 'howling grief of something unresolved' that Ran described Yukari as having and that would explain why it is she gravitated towards Reimu in Mine and her unwillingness to let her go, though it is unknown if she is infertile or not.
- Yukari's supposed infertility is discussed in The Child She Couldn't Have, however it was a tad unclear and it seems only Yukari knew. This is revealed in chapter 2, a Perspective Flip, where she states her infertile status and that her chances of having children are zero.
- On the other hand, in chapter five of Gensokyo 20XXI, Ran pursues a romance with a male kitsune and a few chapters later, in chapter 8, after having been thinking she was getting fat (despite her age and knowledge as a kitsune, she is quite inexperienced, likely due to being servile), she discovers she was indeed pregnant.
- In Foundling, Yukari's infertility is extended to her also miscarrying, as, not only does she have very low chances of conceiving, she's never carried a pregnancy to term, while Ran is mentioned to have had a litter or two by the time of meeting Reimu.
- Yukari's supposed infertility is discussed in The Child She Couldn't Have,
- A Death Note fanfic, Mama, plays it totally straight both ways, to disastrous effects. Karol a maid tries over and over to have a baby but either doesn't conceive or ends up miscarrying soon after if she does. Her employer Adele is pregnant but it's implied that she doesn't really want the baby (it's also implied that the baby is the product of an extramarital affair). Karol eventually snaps, breaks in and shoots Adele and her husband in their home and kidnaps the baby soon after he's born. The baby would grow up to be L.
- In the Hetalia: Axis Powers fanfic Tizenöt, Hungary's shown to really want a baby with Austria. A miscarriage, however, shatters both of them.
- Used extensively by Beautifulpurpleflame (Teen Titans fics):
- In Truth Through Mirrors, Raven falls pregnant during her and Beast Boy's first time.
- The Little Cherub series. Raven falls pregnant after she and Beast Boy have sex while drunk. She runs away and only returns with their kid a few years later. Her and Beast Boy start a relationship, have three more kids (none exactly planned for, though all very much welcome), get married... come seven years later, and Raven is pregnant again despite strict birth control.
- Conceived has both Starfire and Raven falling pregnant due to a villain's weapon's side effects (Starfire from Robin, Raven from Beast Boy, and only the first two are in a relationship in the first place).
- A Late Night of Reflection. The whole fic is Beast Boy thinking about how difficult it was for him and Raven to finally have their son.
- In Timing is Everything, played for both couples and causes quite a bit of tension. On the one hand, Robin and Starfire have trouble conceiving - turns out they are genetically compatible despite being from different planets, but human sperm is too weak for her reproductive system. First, there is an argument about using IVF, then an attempt fails. Raven, on the other hand, has a But I Can't Be Pregnant! moment - she's only supposed to be capable of having children with someone who has demon blood. However, she's dating Beast Boy, and apparently, his shapeshifting abilities extend to his sperm enough to fool Raven's reproductive system. Then Beast Boy recommends that Starfire sits in the T-Car next time she's implanted since that's where Raven got pregnant. Apparently, it works.
- In Truth Through Mirrors
- From A Broken Heart, an Untold Story, and a Sister's Regret, we find out that Ragyo almost died in a childbirth as she gave birth to Satsuki due to complications and, due to said complications and the resulting surgeries, she initially didn't think she could carry another pregnancy to term, growing Nui in a Uterine Replicator and not thinking she was pregnant with Ryuuko until someone pointed it out.
- Played with in The Second Try. Asuka doesn't want to have a baby, even to the point where she's starving herself in a misguided attempt to induce a miscarriage (which, as Shinji later notes, put her in more danger than the baby). However, once she sees the first ultrasound, that changes. Despite these challenges, Aki is born alive and healthy.
- She also tries to keep her pregnancy a secret from her husband. He only finds out by chance when he picks up their trash, after a rat had ripped open a bag, and discovers the positive test. Needless to say, he's not happy. They're not really sure how it happened, as she had been on the pill when she got pregnant. Asuka claims that the drugs were expired, while Shinji suspects that she forgot to be constant in taking it. Of course, it's also possible they fall into that small percentile where it doesn't work, something he lampshades with a weary "We've beaten worse odds before."
- Izumi's situation, as mentioned in the Anime folder, is touched on in the final installment of the Elemental Chess Trilogy. Alphonse's daughter asks about the whole thing, including why she and Sig never adopted a child since they couldn't have their own.
- In the Stargate SG-1 fic "Bless the Children- Ship Version", Daniel confesses that he’s concerned that he might be sterile, as he and Sha’re tried to have children for a year and never conceived and yet Sha’re was able to have a child with Apophis. However, after Daniel starts dating Sam Carter, Doctor Janet Frasier helps him arrange a fertility test and confirms there’s nothing wrong with him beyond what would be expected of a man in his mid-thirties. This discovery prompts Daniel to speculate that maybe the reason he and Sha're had trouble conceiving was that there was something wrong with Sha’re that was ‘fixed’ by Amaunet, allowing her to conceive Shifu.
- This is part of Lady Delphine's briefly-mentioned history in the Contractually Obligated Chaos series. She had one daughter, who died as a baby, and was never able to have other children.
- At first this trope is played straight in the Mass Effect series Parable, which covers the events of the game trilogy. Shepard's mother abused drugs during her pregnancy, so Jane was born biotic but also infertile, which is a sore point for her when she marries Garrus; she sees herself as unable to give him a family.
- Then the trope is averted during the events of [ME2], thanks to the Reaper techs used for her resurrection; Jane becomes pregnant with two hybrids, and despite the approaching war and the knowledge that their children won't be able to live in peace for what they are, the couple decide to go through with it and carry the two fetuses to term.
- Played straight again for the storyline of ME3, after Jane volunteers herself as Mordin's test subject to create a specialized cure for the Genophage. The experience succeeds, but its side effects - combined with the Reaper techs inside her being fried by the Crucible - render Jane infertile once more, completely destroying her and Garrus's wish of giving their twins more siblings.
- In All or Nothing, Harry becomes pregnant after a single non-consensual encounter with Charlie, who was under a glamour and got Harry drunk.
- One chapter of Concerning a Drifter implies that Satsuki is physically unable to have children due to childhood abuse, while Ryuuko, as we know, can and did conceive them in unpleasant circumstances.
- According to the backstory of Skyhold Academy Yearbook, the eponymous school came into being in part because its founders were never able to have children of their own.
- In Soul Chess, Lelouch and Nemu have sex dozens of times without any pregnancies, yet a single instance of Sex for Solace with Susanna leaves her pregnant.
- Mr and Mrs Gold: Because of his curse, Rumpelstiltskin is sterile and therefore cannot give Belle a baby that way. When he finds out that Belle wants one, he tells her that the next child he bargains for will become hers. This is why she tries to make sure that Cinderella honors her side of the deal. This applies in Storybrooke until Rose finds out she is pregnant by the end of the story, averting the trope.
- In Neither a Bird nor a Plane, it's Deku!, Inko and Hisashi Midoriya try and fail numerous times to have a child. They're so distraught after discovering their infertility that they take a vacation to clear their heads. Luckily for them, a certain spaceship came streaking through the sky over their campsite that night.
- In Second Chances (TheNovelArtist), Emma was conceived by Adrien and Chloe after one drunken night while they were actually in the process of a divorce. Nathanael and Marinette, on the other hand, were trying for several years to have a child, but without success. Averted when Adrien and Marinette get married; they are both expecting to require fertility treatments in order to give Emma siblings, but a few months later, they get definite proof the problem wasn't about Mari.
- In the Jem fic The Ripple Effect, Raya was reunited with Luis while on tour in Mexico. They went on a date, Raya lost her virginity, then Raya went back to America. Four months afterwards, Raya finds out she's pregnant.
- Zelda from Blind Courage meets Ganondorf for the first time right before her seventeenth birthday. They meet again a few days afterwards and end up having sex. The next month, Zelda realizes she's pregnant. She hasn't even seen Ganondorf four times yet, though the Reincarnation Romance element of their relationship draws them to one another.
- In some One Piece fanfics, Our Mrs. Monkey and Coby's Choice to use as examples, Luffy and Nami get married due to shenanigans and while they do start a sexual relationship, they do what they can to keep from getting pregnant, only for them to conceive just before the two year timeskip. Which leads into the scary revelation that Nami had to give birth in a low pressure environment with nothing but an easy to panic old man to serve as her only sense of comfort and accoucheurs (a term given to male-midwives).
- In No Time to Breathe Magnolia has sex with Charlie once and becomes pregnant, despite using three different kinds of contraception.
- Downplayed in Ghosts (How To Train Your Dragon). While they want kids someday, Hiccup and Astrid would rather enjoy their time as newlyweds first and take precautions. Astrid still winds up pregnant, since their contraception methods are not 100% effective and she had developed a habit of wrapping her legs around him during sex.
- Stacey's short in Stoneybrook Revisited: A Baby-Sitters Club Fan Series revolves around her friend supporting her after she reveals she's pregnant. She didn't want kids, especially not an unplanned pregnancy in her 20s, but won't abort or give the baby up for adoption.
- I Will Never Be Him establishes that demonic reproduction is rather slow and difficult, and Luo Binghe's Half-Human Hybrid morphology only makes it worse so he would have better luck with human wives. He nonetheless knocks his demon fox consort up on their wedding night.
- In A Bit of Confusion Harry's girlfriend becomes pregnant after they have sex for the first time.
- In Alvan an the Chipmunks 3: The Second Squeakuel Theodore gets Eleanor pregnant the first time they have sex.
- In Some Kind of Disaster Daphne gets pregnant after she and Harry sleep together once while drunk.
