The Acorna Series trilogy ends with Acorna finding out she's pregnant. Somewhat sinisterly, we also find out that She was carrying twins, and one of them was stolen by Greymalkin.
In the Age of Fire books, the first novel ends with the dragon AuRon settling down with Natasatch, lovingly embracing around a clutch of eggs. In the last novel, set decades later, the novel ends with his now-pregnant sister Wistala and her mate DharSii flying off to their home cave.
The epilogue of The Alice Network features Charlie and Finn’s daughter. Justified: The mother in question was pregnant for the entire book, although it took her some time to decide whether to keep the baby.
Anansi Boys plays this straight with Charlie and Daisy's son, but subverts it with Spider and Rosie. Rosie's mother is given to making pointed remarks about her lack of grandchildren and casting aspersions on Spider's virility. It's implied the reason he hasn't had any is because she's so damned insistent, although as mentioned in American Gods, this may just be because it's very difficult for a god and a human to have a child.
If any couple in The Belgariad or Malloreon is married at the end, they'll have children. Relg and Taiba are particularly noteworthy - they marry at the end of the Belgariad and have a small army of offspring by the end of the Malloreon (though it's hinted they're getting divine aid - Taiba was the last Marag, thus her children would be Marags, and Mara wants his people back). Belgarion and Ce'Nedra are noteworthy in another way: at one point in the Malloreon, it is heavily implied that they will be getting children for a long, long time.
Ben and Me: Multiple of Amos' siblings have families of their own by the end of the book.
At the end of The Black Fox of Beckham, Arabella and Finn become mates and have kits, one of whom is black like Arabella.
At the end of A Brother's Price, Jerin Whistler's Mother Eldest has had a son, his Sister Eldest is pregnant, and so is his new wife Halley. (All by different men, don't worry.) This is a setting where childbirth is a risky endeavor in part due to the fact that men in this setting tend to have weak sperm, but the Whistlers are always lucky in that regard.
Codex Alera ends with Bernard and Amara expecting a child in addition to the several they've already adopted (Including Rook's daughter Masha), not to mention Tavi and Kitai's newborn son Desiderus. Both sets of children are unexpected. In Amara's case, she was infertile until the magic mushroom with healing properties cleared that up. And Tavi and Kitai are an interspecies couple, and as far as we know are the first of their two species to get together.
In David Copperfield, David is united with Agnes at the end of the book. Cue time lapse and a heartwarming scene of them living with their young children.
Deltora Quest's third series ended with the Official Couple, Lief and Jasmine, married and having children named after their dead parents. Marilen has given birth to a son, Barda and Lindal have six children, all taller than their parents, and Doom has wandered off to investigate a rumor that dragons can lay eggs without a mate if the need arises, which would be a very happy ending indeed considering each dragon has up until now been the last of their kind.
Divergent: The short story We Can Be Mended, which concludes the series, reveals that Zeke and Shauna are expecting a baby. According to Four, he and Christina fight over the right to name it, though they end up not getting it.
At the end of Dracula, Mina and Jonathan Harker talk of their son Quincy.
Regardless of how bleak most of the Dragons of Requiem trilogies end, at least one couple in each trilogy will get married and/or have children during the resolution.
Near the end of Emma, Mrs. Weston gives birth to a baby girl, Anna.
In the Ender's Shadow series, Anton the geneticist settles down, marries, and has a child in addition to his new step-children. He's also unashamedly gay, but can overcome his sexual urges in order to fulfill his social need for progeny. So, he's fine with being gay, and all, but...
The protagonist of the same series, Bean, was originally going to subvert this trope, as he was afraid of passing on his genetic condition and his lover, Petra, is fine with this. However, various factors, including the aforementioned Anton, convince him to do his reproductive duty and he and Petra eventually have eight children via in-vitro and the last book of the series has a subplot of them having to retrieve seven of them, which have been implanted in other women by Bean's enemy, Achilles. They manage to find six of them, and the eighth one is eventualy found in Ender in Exile. To really drive the trope home, after Bean and the three children with his genetic condition go into space to await a cure, Petra remarries to Peter Wiggin and has six more kids with him.
And in Ender in Exile Graff goes on a long ramble in a letter to Ender telling him to have children, that children are amazing, breed, breed, breed.
And the whole reason he did this is because he himself chose to subvert the trope years ago, choosing to symbolically adopt all mankind as his children and focus on colonizing the former Formic worlds, but now, as a retired, lonely old man, regrets his decision.
The Fifty Shades of Grey trilogy ends two years later, where Ana and Christian are playing with their son, Teddy. Ana is six months pregnant with a daughter whom they plan to name Phoebe. It is also mentioned that Kate and Elliot are married and had a daughter, Ava.
Joe Haldeman's The Forever War ends with the birth announcement of Mandella and Marygay's son from the local paper.
The end of the first Freckleface Strawberry book shows an adult Freckleface with two children, neither of whom inherited her freckles.
In The Garden of Sinners's final light novel, Shiki and Mikiya have a daughter named Mana in the distant future. Said daughter is a huge Daddy's Girl, and wants to "beat her mother to get her father back." (Though she doesn't hate her mom per se, logically). Personality and appearance-wise, Mana resembles Arima Miyako, the other Shiki's cousin in Tsukihime. Oh and she uses her mother's surname since Shiki is quite theUptown Girl.
Goblin Market: Both Lizzie and Laura have children in later years, but we aren't told anything about the children's fathers. Sisterhood is depicted as more important than marriage, despite the fact that both characters are now married.
Hard Times ends with asking whether various events each character imagines will happen to them in their future, then after each paragraph says "such things were to be". Then a fairly typical example is described in Louisa's imagination.
Harry's Mad: The book ends with the parrot "Fweddy" (previously thought male) laying an egg and saying "Call me Fwedwika", which Madison/Mad follows up with "Call me Dad".
Tonks and Lupin give birth to Teddy midway through the book. It's not strictly this trope since it is nowhere near the end and there is a war around them, but this serves as a conclusion to their romantic angst, as Lupin originally did not want to marry Tonks because he was afraid his children would become werewolves like him. As it turns out, Teddy is not.
In the epilogue, it is revealed that Harry and Ginny had three children (James, Albus, and Lily), Ron and Hermione had two children (Rose and Hugo), and Draco had a son (Scorpius). It is also offhandedly mentioned that Teddy is sending off his girlfriend, Victoire Weasley (Bill and Fleur's daughter) as she boards for Hogwarts, along with James, Albus, Rose, and Scorpius.
Word of God further expanded this. Other than the above six, Arthur and Molly Weasley end up with six more grandchildren: Louis and Dominique (Victoire's younger siblings), Fred and Roxanne (George and Angelina's children), and Molly and Lucy (Percy's daughters). Luna marries Rolf, the grandson of Newt Scamander, and has two sons, Lorcan and Lysander.
Rather unsettlingly, Voldemort also joins the fun as he is revealed to have had a daughter with Bellatrix shortly before they died. This daughter, Delphini, is the main antagonist of Harry Potter and the Cursed Child.
Exaggerated in High School D×D. An "EX Novel" set in one possible future of the series shows that Issei had at least one child with every single one of his haremettes.
In the web novel Hokuou Kizoku to Moukinzuma no Yukiguni Karigurashi, Ritzhard & Sieglinde had three sons named Arno, Ulrich & Erenfried, and two daughters named Veronica and Krimhilde, living a happily ever after life together.
The Hunger Games: The epilogue of Mockingjay shows that Annie had a child with the late Finnick. Also, it took fifteen years, but Peeta persuaded Katniss. They end up having two children: a girl with her black hair and his blue eyes, and a boy with his blond hair and her gray eyes.
At the end of The Ickabog, the titular creature has two babies and Roderick and Martha have five children.
Jane Eyre: There's plenty that's dark about the final act, but in the last two pages or so nearly all of that is swept aside in favor of warm feelings. Not only is Jane and Rochester's newborn son one of the last images we get, we also get Rochester miraculously regaining his sight in his one remaining eye so he can see the face of his child.
The book, Jap Herron ends with Jap's wife Isabel Granger giving birth to a baby boy she names Jasper William.
In Peter S. Beagle's The Last Unicorn, a town is afraid to have children because of the prophecy that their prosperity depended on Haggard, and one of their children would bring him down. At the end, when it has been fulfilled, Prince Lir urges this trope on them; it might help.
In the Left Behind book Kingdom Come, Kenny Williams and Ekaterina Risto become a baby-producing couple for the rest of the Millennium.
Little Women: Although Meg had her twins earlier in the book, the "Where Are They Now?" Epilogue chapter shows Jo now with two young sons (and a school full of surrogate sons) and Amy with a baby daughter. Interestingly, only Meg has any more children in the sequels set after this chapter.
Lolita. After she finally escapes him, Humbert eventually finds Dolores several years later, married to a man called Schiller and expecting a child. But it's subverted — the introduction of the novel lists Mrs. Schiller as having died in childbirth.
Sam and Rosie end up having thirteen children, which is a large family even for hobbits. Word of God explicitly states that Sam embodies the true happy end and reason for their troubles: being able to live a simple honest life with a good family and good work.
To a lesser extent, Aragorn and Arwen as well. They have one boy (Eldarion) and several girls (who remain unnamed) before his death 120 years after the end of Return of the King.
Love You Forever ends with the boy, now a man, singing to his infant daughter.
In The Mer, Mers can't have biological children, but in the epilogue, after Val and Will have become a couple, they adopted an infant who transformed into a Mer after drowning in a boating accident. Mer age so slowly that raising him will be a centuries-long commitment.
In Philip Reeve's Mortal Engines's Predator's Gold, Hester is pregnant at the end.
Simona Ahrnstedt has ended two of her novels, Överenskommelser and "De skandalösa", with the story's female protagonist being pregnant. "Överenskommelser" even has an epilogue, that only has been printed in the paper-back version, which really is about the birth of Beatrice's and Seth's baby. The two beta couples already have babies at that point.
Subverted in The Pendragon Adventure, as even though Bobby gets to relive his life as a normal human, his Traveler heritage makes it impossible for him and Courtney to have children.
The original Petaybee trilogy ends with Yana giving birth to twins, who display their father's shapeshifting abilities at birth.
Last time, his pretty wife Helga came, and a lusty crowing baby with her.
In L. Jagi Lamplighter's Prospero Regained, Astreus observes at the end that he and Miranda can both fly — perhaps they should raise a flock. When they are about to marry, he prophesies that they will have this trope and about their descendants.
The end of Redeeming Love reveals that Angel, who was supposedly barren, was able to have four children with her husband Michael after they were finally reunited for good.
The Sally Lockhart mystery Shadow in the North has this ending, with the child going on to be extremely important to the plot in the following book (Tiger in the Well).
There are plenty of new children in the epilogue of Seven Years Awesome Luck, but of particular note is Denneka being pregnant, with the possibility that the baby may inherit cat traits from its father.
The Infernal Devices ends with Tessa and Will marrying and having two children, James and Lucie. However, she only stays with the family until Will dies 58 years after they wed. Following that, she goes to a self-imposed exile; as an immortal warlock, she could not bear seeing her children and descendants grow old and die.
The Last Hours ends with the birth of Cordelia's and Alastair's little brother, Zach, who will presumably carry on the Carstairs family name (and therefore become Emma's ancestor) since Alastair has decided not to adopt a baby after coming out as gay. Also, Charlotte and Henry are expecting twins.
In the light novel ending of A Sister's All You Need, Itsuki & Nayuta had a son named Sora. In the epilogue of the final volume that took place ten years after, Chihiro's monologue reveals that Nayuta is pregnant again with a daughter.
At the end of Spice and Wolf, Holo reveals to Lawrence that she is pregnant after settling down together. The spin-off series Wolf and Parchment focuses on their daughter, Myuri, as one of the main characters.
At the end of The Stand, Fran gave birth to a child from a former relationship and ends up pregnant with Stu's child. Also, Lucy is revealed to have given birth to Larry's twins.
Subverted in Stardust, as Tristran and Yvaine are very happy even though they can't have children, since he's mortal and she's a star. Played straight in the film, though.
The Star Trek novel The Fire and the Rose ends with Spock and his love interest in the story, Alexandra, having a baby girl after they get married. This book is part of a self-contained trilogy separate from both established canon and the Star Trek Novel 'Verse, known as the Crucible trilogynote it's a what-if story based on "The City on the Edge of Forever" and is the middle of the three books, with the others being Provenance of Shadows and The Star to Every Wandering.
Not exactly an ending trope, but in Star Wars Legends just about anyone who has gotten married - be they a main from the movies, an Ascended Extra, or an original - has had children at some point. Almost always one boy, or a set of male-female twins. The exception to that would be Wedge and Iella, who had two non-twin daughters. The only Happily Married couple who didn't have kids would be Winter and Tycho—Winter seems to have considered working as the Solo kids' nanny enough of an experience.
In Hal Clement's Still River, when they plan a return to the planetoid, a woman scientist observes that some of the aliens are coming out of curiosity in her pregnancy.
Stray is about a stray cat telling his grandson his life's story. The last few chapters end on his grandson's mother being born and becoming a pet.
The Suicide Shop has Marilyn Tuvache pregnant with the child of her lover Ernest near the end of the book.
Taste Of Marrow has a variation. Hero and their gay lover Houndstooth decide to retire and open a ranch, so Hero invites recently retired contract killer Adelia to live with them so she can raise her baby as one of their family.
I see the lives for which I lay down my life, peaceful, useful, prosperous and happy, in that England which I shall see no more. I see Her with a child upon her bosom, who bears my name.
Of the characters who have their conclusions told in The Tenant of Wildfell Hall, the good ones are happily married with large families and the bad ones are either dead or miserably alone.
Tomcat Blue Eyes' Diaries: The book ends with an adorable pair of Siamese cats, Kiki and Blue Eyes, having four kittens.
Exaggerated at the conclusion of the Colleen McCullough novel The Touch, where Elizabeth not only introduces her daughter Nell to her new baby brother and sister, her stepfather informs her that she's expecting again.
Of particular note is the Tower and the Hive series, where every major story arc ended with the main female protagonist pregnant. In fact, it went in generations in the series proper: The Rowan was pregnant with Child #2 at the end of The Rowan, Damia (Child #3) was pregnant with her first at the end of Damia and Laria (the child Damia was carrying in the previous mention) was pregnant at the end of The Tower And The Hive (with the implication that her younger brother Thian's lover was pregnant as well)
Trapped on Draconica: In the epilogue, Ben dreams that Daniar is pregnant during her wedding to Kalak.
Meyer's The Twilight Saga sort of ends on this. Bella and Edward have Renesmee midway through Breaking Dawn after an Express Delivery and the last half of the book is spent cleaning up all the loose ends caused by her existence. Oh, and Renesmee is also imprinted by Jacob, ergo solving the Edward-Bella-Jacob Love Triangle. Notable for many readers having found it incredibly repulsive rather than heartwarming.
A later book in the series to date ends with Miles attending the birth of his son and daughter; after that, Cryoburn reveals that Miles and Ekaterin have added two more daughters to the count while all of the Koudelka sisters except Kareen have had at least one child with their respective partners. And most importantly (as far as Miles, Mark and Ivan are concerned) is that Gregor and Laisa have gotten around to securing the line of succession for the throne. By Gentleman Jole and the Red Queen, Miles and Ekaterin are up to six kids, plus Ivan and Tej (offscreen) have apparently spawned. The kicker, however, would be Cordelia and her late husband Aral's male partner Oliver Jole. Cordelia uses frozen sperm willed to her by Aral to produce six female zygotes, all of which she plans to have brought to term. She also shares some of Aral's sperm, as well as leftover enucleated eggs from her, with Oliver so that he can engage in Homosexual Reproduction and produce sons that will be biologically both his and Aral's. Three of them.
War and Peace features the two surviving couples—Pierre and Natasha, Nikolay and Marya—each with several children in the epilogue. Naturally most of them are named after deceased friends of their parents.
Firestar's Quest ends with an epilogue three moons after the main story, with Firestar and Sandstorm naming their newborn daughters.
Bramblestar's Storm ends with an epilogue in manga format, where Bramblestar and Squirrelflight realize that Squirrelflight is pregnant with their kits. This is particularly significant as they're the couple with the greatest case of Official Couple Ordeal Syndrome in the series and there was a whole big deal over the last two arcs where Squirrelflight had been led to believe she could never become pregnant, so she'd secretly adopted her sister's forbidden kits and hadn't told Bramblestar the truth, which had led to drama between them.
The ending to We Can't Rewind, though whether one should consider it heartwarming or creepy under the circumstances is left for the reader to decide.
In The Widow of Desire, Natalie Stuart marries Russian businessman Wallace Nevsky, but he is killed due to his uncovering of a conspiracy in the USSR. When caught up in the events herself, she finds out she's pregnant with Wallace's son.
Subverted in The Woman in Black. Arthur Kipps unravels the Woman in Black's mystery, marries his fiancée, and has a son with her. It seems happily ever after, until The Woman in Black murders his wife and son a year later.
In The Woman in White, Laura, who has been sick for most of the last quarter of the novel, marries her love interest and they have a son. The birth of Laura's son isn't just happy for general sentimental reasons, but also represents a final victory over the villains who tried to deprive her of her inheritance; the Fairlie estate was entailed to only be inherited by male relatives, which is why her uncle got it after her father, but now on her uncle's death it comes to Laura in trust for her son.
At the end of volume 8 of If It’s for My Daughter, I’d Even Defeat a Demon Lord, Dale marries his adopted daughter Latina when she turned into adulthood and later in the epilogue, is seen holding the hands of a boy and a girl, with both of them addressing Latina as mother.
