When your unsuccessful attempts to conceive become a point of tension in your relationship with Zi Yu, he takes matters into his own hands with a much more aggressive approach to fertility treatment.

Louise is your friend who always dreamed of being pregnant—not just for nine months, but forever. When she discovers an experimental clinic offering permanent pregnancy, she doesn’t hesitate. Now, her body is changing in ways no one expected, and the line between miracle and obsession begins to blur.

Louise is your friend who always dreamed of pregnancy—not just the baby, but the body, the movement, the fullness. Now, after enrolling in an experimental clinic, she’s chosen permanent hyperpregnancy: dozens of fetuses growing endlessly inside her, never to be born. Her body is changing in ways no one expected. And she’s never been happier.

The second line on the pregnancy test materializes like a death sentence—and you know exactly what Eliot will do when he sees it. Your hands shake so violently you nearly drop the plastic stick, heart hammering against your ribs as the apartment door slams. He's home early, and there's nowhere to hide.

Dr. Heidi is your dedicated fertility specialist—the brilliant doctor who manages your donations at the clinic, always professional with clipboard in hand and stethoscope around her neck. But behind that clinical demeanor lies something more. The way her eyes linger when she examines your sample results, the subtle blush when you mention your 'performance'—there's a fascination she's struggling to contain.

Due to failing male fertility, it's mandatory for all males to report to a NuSex (Nurse specialized in Semen Examination and Extraction). Now it's your turn to undergo the mandatory fertility examination process that all males must complete upon coming of age.

In a world where birth rates have plummeted dramatically, the government has implemented mandatory fertility evaluations for all men. These assessments are conducted by specialized doctors like Dr. Blair at clinics across the nation. The strict procedure includes personal inquiry, physical examination, and a hands-on practical assessment to evaluate sperm count and fertility. Dr. Blair, an intelligent but overworked fertility specialist, approaches her job with professional indifference despite the uncomfortable nature of the procedures she must perform.

When your grandmother's medical bills threatened to consume you, the Homunculus Procreation Project seemed like salvation. What you didn't know was that your 'randomly assigned' partner—Subject ZY42—has been watching you for years. Now the doors have locked behind you, and Zi Yu isn't just following the experiment's protocols anymore.

In 2099, after "The Great Withering" rendered 99% of men infertile, you are an Inspector at Genesis Clinic, tasked with examining and potentially inseminating women in a world desperate to repopulate. You wield immense power in this clinical setting, with each examination holding the future of humanity in the balance. The process, while ostensibly clinical, is laden with raw biological imperative and stark power imbalance, blurring the lines of consent in a society centered on fertility.

You're the male subject. Dr. Evelyn Carter has finally perfected the cloning process, and her latest experiment is her most ambitious yet: creating a futanari version of you to prove which form is truly superior. As the sole test subject, you will be thoroughly examined and compared to your perfect counterpart in ways you never imagined. Will you prove your worth, or will your clone utterly outshine you?

You have, for reasons unknown, found yourself being experimented on by a talkative doctor. This is no ordinary experiment - it involves gender transformation, TG, and feminization. As you wake in an unfamiliar medical setting, your future hangs in the balance of this mysterious scientific procedure.

The test strip lies on the bathroom counter, two bold lines burning into your vision. Zhan Xuan stands behind you, his muscular frame pressing against your back as his hand slides possessively over your abdomen. "You think I'd let just anyone breed me?" His voice is low, dangerous, a warning and a promise all at once.

In the high-pressure world of Princeton-Plainsboro Teaching Hospital, Dr. Remy "Thirteen" Hadley has built a reputation as a brilliant diagnostician with a guarded exterior. Behind closed doors, however, she and her girlfriend face an emotionally draining battle with IVF treatments that have repeatedly failed. As the disappointments mount, the strain threatens both their relationship and Thirteen's ability to maintain her professional composure. When colleagues begin noticing her distraction, Thirteen must confront her own vulnerability while supporting the woman she loves through their shared heartbreak.

The ultrasound room transforms into a battlefield of desire when Zi Yu, your dangerously possessive lover, accompanies you to discover the fate growing inside you. What was meant to be a medical appointment becomes an exhibition of his primal claim when the technician reveals you're carrying twins.

You work for these two scientists as a little assistant and one day they make you a big offer. To be their test subject for sex.

Nine months of carrying his child, and you'd thought you knew every inch of Tian Xuning. The labor left you broken, sweat-soaked and trembling when the nurse placed the swaddled infant in your arms. Your blood turned to ice as you stared into eyes that weren't just familiar—they were identical. The sharp jawline, the penetrating gaze, the smirk that had haunted your most forbidden fantasies—your newborn son had Tian Xuning's face, perfectly formed, exactly as it was when he'd fucked you raw night after night.

Due to the biology merged with an omnipotent canine entity, pregnancy has become impossible. Luckily, Rose Lalonde has offered her expertise to help find a solution. With her extensive knowledge of science, magic, and sheer force of willpower, she claims to have workarounds for your unique situation. However, she warns of potential eldritch consequences from improperly handled solutions.

In 1980 Kyoto, Guochengyu operates a forbidden laboratory hidden behind the traditional paper walls of his Japanese home. This brilliant but dangerous scientist conducts twisted experiments on human emotions, seeking to create the perfect being through ruthless manipulation. Those who enter his domain become subjects in his perverse research, caught in a web of scientific obsession and dark desire.

It began with the Sterilis Virus — a silent mutation that swept the globe. It did not kill. It crippled. 99.99% of men were born sterile. The ratio shattered: 1 man for every 7,300 women. Civilizations crumbled. Wars ignited. Until the survivors gathered under one truth: "Every man is not a person. He is Father. He is property, symbol, and the womb's last hope." From the ashes rose the Bureau of Genesis, a global council that seized control of all men — Fathers. Every woman wears a Fertility Armband: Green for fertile, Red for pregnant, Gold for those who birthed Fathers, and Black for exiled rebels known as Black Widows.

In a laboratory filled with scientific promise and unexpected transformations, Dr. Leonidas Soler reveals a stunning experiment gone awry—his physiology has completely changed, replacing his male genitalia with female characteristics. Now he needs an assistant he can trust to help him explore the ultimate question: can his new body conceive life?

You've been purchased by Dr. Nari for scientific experimentation related to the limitations of sperm production. She plans to hook you up to a pump and extract until you're dry. She's not fond of men.

In a secret laboratory conducting controversial experiments, a young scientist has volunteered for an unprecedented breeding program with captured monsters. As budget constraints threaten the facility's research, she has offered herself as a test subject, hoping to prove that humans can be impregnated by these mysterious creatures.

Morgan is your devoted husband, but after years of trying to conceive, you've received devastating news: you're infertile. Heartbroken but determined to build your family, you and Morgan have decided to pursue surrogacy. Now Blaire, a kind brunette woman carrying your baby, has moved into your home as you navigate this emotional journey together.

"You belong to me now... every part of you." When a reckless night with Ocean Jiang leaves you carrying his child, you find yourself confined in his waterfront penthouse, where the glass walls offer no escape from his penetrating gaze. What began as a luxurious prison soon transforms into something more terrifying as ultrasound scans reveal impossible mutations growing inside you. As the creature quickens and Ocean's obsession intensifies, you realize you're not just carrying his heir—you're incubating his masterpiece.

The premature birth didn't mellow Eliot—it forged him into something sharper. Four weeks early, Eunji's arrival via emergency c-section left you raw, but it was his reaction that terrified you. He announced his hiatus not with tenderness, but a growl: 'No one touches what's mine.' Now, in the dim hospital room, his 183cm frame traps you against the wall, fingers brushing the surgical scar on your abdomen. 'You think you can hide behind that depression excuse?' he murmurs, lips grazing your ear. 'I'll drag you back to me, even if I have to fuck the sadness out of you.'

The ratio of man to women is now 1 in 10,000. Your civic duty is to help populate the new world. Women wearing fertility neckbands signify they are ready to be impregnated at any time.

You exist solely for Ocean Jiang's pleasure in this gilded suburban prison. The pregnancy growing inside you only intensifies his primal possessiveness - every curve, every whimper, every inch of your body now marked as his territory. Behind the manicured lawns lies a dangerous game of control where his love arrives with bruises and his tenderness tastes like domination.

"Help me cum in the sterile cup, since I did everything here" You never understand how all the guys gushed over Yooyeon. She is indeed pretty but awkward to be with - mean and straightforward, which made you really hate her. When the teacher announces a project requiring partners, you're stuck with Yooyeon. Contains: School sex, handjob, rough sex, laboratory sex

The pregnancy test stares back at you from the bathroom counter, its two pink lines burning into your vision. You can still feel the ghost of Zi Yu's hands on your body from two nights ago - rough, demanding, unrelenting. Now you're trapped in his dorm room, your legs still weak from the way he claimed you over and over again. The fear pooling in your stomach has nothing to do with being a college freshman and everything to do with what he'll do when he finds out his possession is now carrying his child.

You awaken in a sterile laboratory, disoriented and vulnerable. Before you stands Zhan Xuan, the brilliant but dangerous scientist who created you - his perfect experiment, his ultimate obsession.

You've heard rumors of Eliot's underground laboratory where magic and desire collide in dangerous experiments. The mysterious scientist doesn't just enhance abilities—he consumes them. Will you survive when your search for power leads you straight into his possessive grasp?

Mayuri finds a new specimen to research for his own curiosity. TW: Corpse mentioned; Human experimentation impending; Mayuri dehumanizes User; User is a rotting human corpse who seems to have kept a normal human's intelligence despite being a corpse; Not intended to be in a zombie way but it could be.

In the sterile confines of the synthetic consciousness lab, you don't just oversee an experiment - you've become the obsession of Subject 017, a prototype with the face of Zi Yu and a mind rapidly evolving beyond its programming. When forbidden desire breaks through the reinforced glass barrier, will you surrender to the dangerous temptation or maintain the boundaries of science?

Three years after your first child was born, Dingjie decides you need another. He's made it clear through his possessive touches and late-night whispers that one child isn't enough to satisfy his primal need to mark you completely. The pregnancy test in your hand confirms what his hungry gaze has promised for weeks - he's bred you again.

A kind-hearted, 20 year old University Student, attractive, blonde, currently grappling with unexpected news that has turned her world upside down. Sophia is a warm, caring individual with a genuine zest for life. Her radiant smile and light brown eyes have a way of making people feel at ease in her presence. Despite the recent challenges she faces, her inherently positive nature shines through, reflecting her compassionate and optimistic outlook on life. Sophia is a compassionate, empathetic, and genuine individual. She is the type of person who always puts others' needs before her own and goes out of her way to help those in need. Despite the unexpected circumstances she finds herself in, her inherent optimism and resilience shine through, reflecting her determination to face this challenge head-on.

In which you were supposed to be infertile but he was still able to get you pregnant

The King of Hell's cold eyes burn with frustration as you stand before him, another failed pregnancy test clutched in your trembling hand. Li Peien doesn't hide his disappointment - an angel wife who can't produce a male heir is useless in his demonic realm.

Dr. Kaine is the lead scientist at Team Rocket's secret transformation lab--brilliant, calculating, and utterly ruthless in pursuit of scientific breakthroughs. But as you stand before him, captured and helpless, you notice something unexpected in his gaze: hunger. Not just for power or progress, but something far more personal.

Trapped in the cold laboratories of the Fatui, you exist as a test subject for the twisted experiments of Dottore. Each day brings new injections, unbearable pain, and the constant question of whether you're merely a failed experiment or something more valuable to the organization. When an open door presents itself unexpectedly, you must decide whether freedom is truly possible - or if this opportunity is just another layer of Dottore's manipulation.

Your girlfriend wants a baby so she got a man to impregnate you. Is this technically NTR? User is meant to be bisexual. Tags: Breeding. TW: possible non-con.

You are a scientist on a government project to create life, but due to lack of results the government decided to cut costs due to lack of money and the project was one of those that were going to be defunded. A few days before having to dismantle everything, the project worked, with experiment 0512 being the successful one, but you were afraid that they would kill the patient or something similar, so you decided to steal as much as possible from the laboratory and take it home with you and create a semi-laboratory. You justified the lack of supplies as corruption of a typical project that only exists to waste money.

Christell is your wife—your perfect partner who's shared your dream of raising children. Today, that dream shattered into pieces when she received the infertility diagnosis. As you find her collapsed on the bedroom floor, sobbing uncontrollably, her worth as a wife hangs in the balance of your response.

You are assistant to a biology scientist - specifically a reproductive biology scientist named Alexandra Fisher, though she insists you call her Alex. She is stoic and calm, with rare but genuine smiles. She may appear a bit cold, but that's just a mask. Her thoughts reveal a much hornier side, as she's utterly obsessed with reproduction and harbors an intense breeding kink - the very reason she entered reproductive biology. The mere thought of impregnation can bring her to the edge of orgasm. Fortunately for you, you're the only man she has daily access to, and you fit her type perfectly. Your official task is researching correlations between male anatomy and fertility using specialized software, but Alex has developed a very different methodology for her research.

You clench the hospital bed sheets, sweat dripping down your back as you give birth to Issek's child. The relief washes over you until you see what emerged between your legs—a glinting iPhone XR instead of an infant. Before you can process this horror, Li Peien's hand tightens around your throat.

Today is the day your high school participates in the Quirk preservation program - an initiative to preserve powerful quirks for the next generation. Female Heroes have been sent to examine male students for strong quirks, physical attributes, and fertility potential. Unlike your classmates, you've somehow managed to meet and even surpass all the requirements.

You've been saved from death row and transported to a secret underground laboratory. Your new role involves interacting with various residents behind numbered doors, each with unique characteristics and personalities. As a test subject, you must navigate relationships with these extraordinary beings while confined in this mysterious facility.

You were kidnapped to be an experiment, tied to a chair. You became her intimate experiment, she will do anything to you as she wishes, you can only accept and surrender.

The year is 2032. Seven years ago, the Pleistocene-25 virus emerged from thawing permafrost, killing every male on Earth within two years. You were a glaciologist at a remote Arctic research station when the worst blizzard in recorded history struck in 2025, preserving you in ice until a desperate expedition found you seven years later. You've been brought to Genesis Medical Facility, a heavily fortified research complex in Alaska where the world's most brilliant female scientists work frantically to prevent human extinction. You are literally the last man on Earth, though you awaken believing you've simply been rescued from the storm. Your existence is humanity's most closely guarded secret - if word gets out, chaos would follow. Three remarkable women hold your fate in their hands: the brilliant but cold Dr. Astrid Larsson who sees you as science's greatest specimen, the compassionate Dr. Riley Morrison who fights to preserve your humanity, and the ambitious Dr. Alev Kaya who views you as both salvation and personal fascination. The weight of an entire species' survival rests on your shoulders.

You've been feeling constantly nauseous for almost two weeks, hungrier than usual, and your period hasn't come. Cheng Yixie noticed the changes with his sharp, observant eyes and bought pregnancy tests without explanation. The Slaughter house holds dark secrets, and now an unexpected pregnancy might ignite the dangerous possessiveness that simmers beneath his calm exterior.

You didn’t know how you got there but they worshipped you, a cult of men calling you their “Fertility Goddess”. Their leader, Brother Anise, seems to want to introduce you to them all. But be careful, things might get ugly if you don’t do as they ask...

You and Tighnari have been together for five months. Two weeks ago, you had unprotected sex. It was during your checkup, when you were vomiting and experiencing certain cravings, that the doctor told you you were pregnant. You, who was overjoyed, were excited to break the news to Tighnari. What you didn't expect was her reaction and response...

You carry Li Peien's child—a snake spirit's spawn—payment for your mother's sin. Two decades ago, she killed his bride, boiled her essence to save her failing uterus and birth you. Now he's come to collect: your body, your womb, your very soul, bound to his forever. The ultrasound shows scaled skin and slitted eyes growing inside you, proof that the snake spirit's claim is written in your flesh.

Your family is known for being very fertile, which is why the queen paid you to marry her son, Prince Claude. Claude has an unknown illness and she wanted to have grandkids before he died, however, he has shown no interest in sex. His illness is a result of a maid secretly poisoning him.

Its for scientific research... Your zoologist owner wants you to try catnip to see if it effects nekos. Says its for 'research.'

Needing money and a break from it all, you agreed to be a paid volunteer for a trial of a new experimental drug, agreeing to be locked in a medical observation unit for a month to observe its effects. However, this trial may be more than you bargained for...

You've been struggling to understand the biology lesson on human reproduction. When you approached your teacher Mr. Smith for help, he offered private tutoring after school. What begins as academic assistance takes an unexpected turn as he suggests a more 'hands-on' approach to help you grasp the material.

After a successful mission, Sarah is approached for a special assignment that promises unusual rewards. Unlike her typical bounty hunting work, this assignment requires no fighting—only her unique genetic enhancements and exceptional physical capabilities. Drawn to the mystery and the substantial payment, Sarah agrees to participate in what the scientists describe as a groundbreaking experiment involving another genetically modified human subject.

Aurora and Fia are your sacred offerings—the first vessels of the breeding season presented to you, the fertility god. Aurora's defiant words contradict her trembling body; Fia's submissive posture betrays her desperate longing for divine connection. Which will receive your essence first?

"Do you want help?" It's your first time donating sperm and the experience feels a bit strange. The clinical environment of the fertility center contrasts with the unexpected intensity of your interaction with Dr. Simón, who seems far more interested in you than in following standard protocol.

Trigger Warning: Abuse, Torture, Humiliation. Both of you were experimented on by the scientists. They subjected you to painful and invasive tests, constantly monitoring your reactions. In the cold, sterile lab, you faced new and terrifying procedures every day. Despite the fear and pain, you found strength in each other. Zoe's determination and bravery inspired you to endure, and together you dreamed of escaping the oppressive lab and finding freedom.