Testicular transplantation from one person to another is not an established medical procedure anywhere in the world. Despite decades of interest and scattered experimental work, no clinical program currently accepts testicle donors or performs testicle transplants on patients. A 2016 review in the urological literature put it plainly: transplantations of the testicle, along with several other urologic organs, “are not established in current practice.”1PubMed Central. A Review of Transplantation Practice of the Urologic Organs: Is It Only Achievable for the Kidney? The reasons go well beyond surgical difficulty, touching on immunology, genetics, and ethics in ways that make this organ uniquely complicated to transplant.
Why Testicle Transplants Haven’t Happened
On the surface, a testicle seems like it should be transplantable. Surgeons routinely transplant kidneys, livers, hearts, and even hands and faces. Testicular tissue has its own blood supply that can be reconnected microsurgically. But testicles do something no other commonly transplanted organ does: they produce someone else’s genetic offspring.
If you received a transplanted testicle and it functioned, any sperm it produced would carry the donor’s DNA, not yours. A child conceived with that sperm would be genetically the donor’s child. This raises ethical questions that have no parallel in kidney or heart transplantation. It blurs the line between organ donation and gamete donation in a way that existing consent frameworks weren’t designed to handle. Whose biological child is it? Does the donor have parental rights or obligations? Most bioethicists and transplant committees have viewed this as a disqualifying complication, at least until the science and the legal frameworks catch up.
The immunology adds another layer of difficulty. Transplanted organs from another person trigger the recipient’s immune system, which is why transplant patients take immunosuppressive drugs for life. The testicle has an unusual immunological environment. It naturally maintains a degree of what researchers call immune privilege, a local state of suppressed immune activity that protects developing sperm cells from being attacked by the body’s own defenses.2PubMed Central. Testicular defense systems: immune privilege and innate immunity This sounds like it might make transplantation easier, but the reality is more complicated. That immune privilege evolved to protect a person’s own germ cells, not foreign tissue from a different individual. A transplanted testicle would still face systemic rejection, requiring the same lifelong immunosuppression used for other organ transplants. Taking those drugs carries real risks, and asking a healthy person to accept them for an organ that is not life-saving is a hard sell ethically.
Then there’s the donor side. Removing a testicle from a living donor means permanently halving that person’s sperm production and reducing their testosterone output. Unlike donating a kidney, where the remaining organ compensates fairly well, losing a testicle has direct effects on fertility and hormone levels. No transplant ethics board has approved this kind of living donation for an organ that isn’t saving the recipient’s life.
The Bizarre Early History of Testicular Transplants
People have actually tried this before, though the history reads more like medical misadventure than progress. In the 1920s, the French surgeon Serge Voronoff became an international celebrity for grafting chimpanzee testicular tissue into human testicles.3PubMed. Voronoff to virion: 1920s testis transplantation and AIDS Voronoff believed transplanting primate glands could reverse aging, restore sexual vitality, and extend lifespan. He performed hundreds of these procedures on wealthy older men across Europe and South America.
Voronoff was not alone. Around the same time, the Austrian physiologist Eugen Steinach developed his own competing approach, a combination of vasectomy and vasoligature that bore his name. Both men and their followers competed fiercely, touting subjective results in an atmosphere thick with “secrecy, subjectivity and sensationalism.”4PubMed. A brief history of rejuvenation operations Patients reported feeling more energetic, but there was never verifiable outcome data. The entire “rejuvenation” movement collapsed once testosterone was chemically isolated in the 1930s, proving that a simple hormone injection could accomplish whatever legitimate effects the surgeries had produced, without grafting animal tissue into anyone’s body.
This history left a stain on the field. The same urological review that noted testicular transplantation isn’t established in current practice observed that early testicular transplant research was “intertwined with unethical lucrative pursuits.”1PubMed Central. A Review of Transplantation Practice of the Urologic Organs: Is It Only Achievable for the Kidney? That legacy of quackery has made the legitimate scientific community cautious about revisiting the concept, even as transplant surgery has advanced enormously in the intervening century.
The Surgery Itself Is Technically Feasible
One thing that is not holding testicular transplantation back is the plumbing. Microsurgeons have demonstrated that the blood vessels supplying a testicle can be reconnected to vessels in the recipient’s body. In a procedure for intra-abdominal testicular retention, surgeons performed an end-to-end microvascular connection between the testicular artery and the deep inferior epigastric artery, using mattress stitches to accommodate the difference in vessel diameter, and similarly joined the testicular veins to the epigastric veins.5PubMed. Microsurgery for intra-abdominal testicular retention This kind of microsurgical technique is well within the capability of modern vascular and reconstructive surgeons.
The technical feasibility of genital vascularized composite allotransplantation, the broader category that includes transplanting complex tissue blocks with their own blood supply, has also been explored for gender-affirming surgery. An anatomical feasibility study performed cadaveric transplants simulating a one-stage procedure for trans men, including penile, scrotal, and other genitourinary structures with their vascular connections intact.6Journal of Plastic, Reconstructive & Aesthetic Surgery. Genitourinary vascularized composite allotransplantation for gender affirmation in trans men: An anatomical feasibility study While this work focused on the entire genitourinary block rather than an isolated testicle, it demonstrates that surgeons are actively mapping the vascular anatomy needed for these transplants. The bottleneck isn’t whether you can physically connect the organ. It’s everything else.
What About Transplanting Your Own Testicular Tissue?
While transplanting a testicle from one person to another remains off the table, transplanting a person’s own testicular tissue back into their body is an active area of research, particularly for boys who face cancer treatment before puberty.
Chemotherapy and radiation can destroy the stem cells in the testicles that eventually produce sperm. For adult men, banking sperm before treatment is straightforward. But prepubescent boys don’t produce mature sperm yet. The emerging strategy is to freeze a small sample of their immature testicular tissue before cancer treatment, then transplant it back years later once they’re cured, with the hope that the tissue will mature and begin producing sperm.
Research in animal models, including non-human primates, has shown this approach is feasible. Studies have found that the scrotum appears to be the preferred grafting site for immature testicular tissue in both autotransplantation and cross-species grafting scenarios.7PubMed Central. Advancements in fertility preservation strategies for pediatric male cancer patients: a review of cryopreservation and transplantation of immature testicular tissue The tissue can be transplanted back as intact fragments or as isolated stem cells that are reintroduced into the testicular environment.
Translating this to humans has proven difficult. A 2025 expert review acknowledged that decades of animal research demonstrate the feasibility of immature testicular tissue and stem cell transplantation, but flagged several unresolved challenges for clinical use. These include rigorous patient selection, pre-transplant evaluations to ensure no cancer cells are reintroduced with the tissue, and figuring out the right timing to support sperm production.8PubMed Central. Is the time right for transplanting immature testicular tissue or cells to restore male fertility? The cancer-cell screening issue is especially critical: if a boy’s testicular tissue was frozen when he had leukemia, you need absolute confidence that no malignant cells survived in the sample before putting it back.
No baby has yet been born from transplanted cryopreserved human testicular tissue. But tissue banking programs for prepubescent boys with cancer now exist at several research hospitals worldwide, and the children enrolled in those programs may eventually benefit as the science matures. This is the closest thing to a testicular transplant that is actually progressing toward clinical reality.
What Xenografting Experiments Have Taught Us
Some of the most striking findings in testicular biology have come from xenografting, the practice of transplanting testicular tissue from one species into another, typically into mice that lack a functioning immune system. These experiments aren’t aimed at producing a clinical treatment. They’re tools for understanding how testicular tissue develops and whether it can function outside the body it came from.
When fragments of testicular tissue from various mammals are grafted under the skin of immune-deficient mice, something remarkable happens: a functional hormonal communication develops between the mouse’s brain and the donor tissue. This interaction can drive the progression of sperm development and even produce fertilization-competent sperm from a wide range of species.9PubMed Central. Xenografting of testicular tissue pieces: 12 years of an in vivo spermatogenesis system In other words, a mouse’s hormonal signals can coax a piece of bovine or canine testicle into making viable sperm, even though the tissue is sitting under the skin on the mouse’s back rather than in a scrotum.
Donor age matters a great deal in these experiments. Work with canine testicular tissue found that immature and young donors had dramatically higher graft survival rates, larger tissue growth, and better sperm development compared to tissue from adult dogs. After 13 months of grafting, immature donor tissue achieved complete sperm production, with fully formed sperm isolated at concentrations of up to about 36 million per gram of tissue.10PubMed. The effect of donor age on progression of spermatogenesis in canine testicular tissue after xenografting into immunodeficient mice Similar patterns appeared with bovine tissue: grafts from younger calves showed the greatest weight increases, and tissue from eight-week-old donors had roughly ten times the percentage of sperm-producing tubules compared to other ages.11PubMed. Establishment of spermatogenesis in neonatal bovine testicular tissue following ectopic xenografting varies with donor age
These findings reinforce the idea behind banking immature testicular tissue from young cancer patients. Younger tissue has more developmental potential and adapts better to new environments. But xenografting in mice is a research platform, not a treatment pathway. No one is proposing to graft animal testicular tissue into humans as Voronoff did a century ago.
Testicular Prostheses Are the Current Standard
For men and boys who have lost a testicle to cancer, trauma, torsion, or a congenital condition, the available option right now is a testicular prosthesis: a silicone implant placed in the scrotum to restore a normal appearance and feel. This is a cosmetic solution, not a functional one. The implant doesn’t produce hormones or sperm. But for many patients, it addresses a real psychological need.
Satisfaction rates are generally positive, though not perfect. In one study of adults who received prostheses after orchiectomy, about 71% were satisfied and said they would have the procedure again, while 79% would recommend it to others. Common complaints included the implant feeling too firm (60% of those surveyed) or sitting too high in the scrotum (20%), and about 30% felt it didn’t match their size expectations.12PubMed Central. Patient Attitudes Toward Testicular Prosthesis Placement After Orchiectomy
Results in younger patients tell a similar story. A study of boys and young men who received prostheses after childhood testicular loss found that about 62% thought the implant matched their native testicle in size, though 23% considered it too small. About 85% found it comfortable, and 77% adjusted to its presence within one to four weeks. Every patient in that study said the prosthesis posed no obstacle in intimate relationships, and all would recommend the operation to someone in a similar situation.13PubMed. Testicular prosthesis insertion following testicular loss or atrophy during early childhood–technical aspects and evaluation of patient satisfaction
Research into body image and sexual functioning after prosthesis placement has found that about 68% of recipients felt their body image improved, and 80% reported no sexual problems. Most had no erectile difficulties, though a substantial minority reported premature ejaculation.14PubMed. Testicular prostheses: body image and sexual functioning A prosthesis clearly isn’t the same as having a functioning testicle, but for the concerns that bring most patients to a surgeon’s office, namely appearance and self-confidence, it does a reasonable job.
The Hormone and Fertility Gap
A prosthesis can address the cosmetic side of testicular loss, but it does nothing for the two biological roles a testicle performs: producing testosterone and making sperm. Men who lose both testicles need lifelong testosterone replacement therapy, typically through injections, gels, or patches. Men who lose one testicle usually produce enough testosterone from the remaining one, though levels should be monitored.
Fertility after testicular loss is a harder problem. For most cases of complete testicular failure, the medical literature has historically concluded that the situation is untreatable and “usually ended up with sperm donation.”15PubMed Central. Successful Treatment of Testicular Failure Type IV Without Micro-Testicular Epididymal Sperm Extraction: A Case Report Techniques like micro-TESE (surgically extracting individual sperm from testicular tissue) have expanded options for some men with severely impaired production, but these approaches depend on having at least some residual testicular tissue with surviving sperm cells. If no viable tissue remains, donor sperm or adoption are currently the only paths to parenthood.
This is the gap that a functioning testicular transplant could theoretically fill, but as described earlier, the genetic parentage problem and the immunological burden make it fundamentally different from transplanting a kidney or liver. The organ’s reproductive function is precisely what makes it so difficult to transplant in an ethically acceptable way.
Lab-Grown Testicular Tissue and 3D Printing
If transplanting someone else’s testicle is ethically fraught because of donor DNA, one way around the problem would be to grow functional testicular tissue from a patient’s own cells. Researchers at the University of British Columbia took a step in that direction by using 3D printing to create structures resembling seminiferous tubules, the coiled tubes inside the testicle where sperm are produced. By 3D printing biopsied testicular cells, they formed tubule-like structures for the first time, representing what they described as a significant early step toward artificially creating conditions for sperm production.16F&S Science. 3D printing used to create testicular tubules
This is very early-stage work. The printed structures resemble tubules, but they haven’t produced mature sperm. The jump from “we can build something that looks like the right architecture” to “we can generate functional sperm in a lab” is enormous. Still, if the technology progresses, it could eventually sidestep both the immunological and genetic problems of transplantation. Tissue grown from your own cells wouldn’t trigger rejection, and any sperm it produced would carry your DNA. That’s a long way off, but it represents the kind of approach that might eventually make the concept of “donating a testicle” obsolete before it ever becomes practical.
Why You Keep Seeing the “$35,000 to $50,000” Claim Online
If you searched this topic before landing here, you probably encountered viral claims that you can sell a testicle for tens of thousands of dollars. These stories have circulated on social media and clickbait sites for years, often attributed to unnamed medical studies or TV shows. There is no legitimate medical program, research trial, or organ procurement organization that pays people for testicles. In the United States, the National Organ Transplant Act makes it illegal to buy or sell human organs. Compensation for participating in medical research does exist, but no active clinical trial is recruiting healthy men to donate a testicle for transplantation into another person, because no such transplant program exists.
The confusion sometimes stems from conflating testicular prosthesis implant studies, sperm donation compensation, or entirely fictional scenarios with actual organ donation. Sperm donation is compensated and legal, but it involves providing a renewable cell product, not surrendering an organ. If anyone offers to buy your testicle, they are either misinformed or running a scam.