Health
Sperm donor with hidden cancer gene fathers nearly 200 kids, families blindsided
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A sperm donor whose samples helped conceive nearly 200 children across Europe unknowingly carried a cancer-causing genetic mutation — a hidden risk now tied to multiple childhood illnesses and early deaths.
An investigation led by the BBC and many other public service broadcasters revealed that the donations were made to Denmark’s European Sperm Bank (ESB). Those donations were then used by 67 fertility clinics in 14 countries over a 17-year span.
The donor, who was not identified, was paid to donate as a student beginning in 2005, according to the report.
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Although the donor passed the initial health screenings, he had hidden genetic mutations that damaged the TP53 gene, which helps to prevent cancer by repairing DNA damage or trigger the death of cancer cells.
When TP53 is mutated, those protective functions are lost, which can lead to uncontrolled cell division, accumulation of mutations and tumor growth, research has shown.
A sperm donor whose samples helped conceive nearly 200 children across Europe (not pictured) unknowingly carried a cancer-causing genetic mutation — a hidden risk now tied to multiple childhood illnesses and early deaths. (Getty Images)
Up to 20% of the man’s sperm would contain that mutated gene, and any children conceived from that affected sperm would have the mutation in every cell of their body, the BBC report stated.
As a result, these children would have a 90% risk of developing some type of cancer in their lifetime, including breast cancer, bone cancers, brain tumors and leukemia. This heightened risk is known as Li Fraumeni syndrome.
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Doctors raised these concerns at the annual congress of the European Society of Human Genetics (ESHG), which was held in Milan in May 2025.
At that conference, Edwige Kasper — a specialist in cancer genetics at Rouen University Hospital in France — presented the case of the sperm donor whose genetic material carried the harmful variant.
“This is the abnormal dissemination of genetic disease. Not every man has 75 children across Europe.”
It was reported that 23 children had been confirmed to have the variant at that time, 10 of which had already been diagnosed with cancer.
The actual number is likely much higher, the report surmised, as at least 197 children were born from the donated sperm — but not all data has been collected.
Kasper called for a limit on the number of births or families for a single donor in Europe.
“We can’t do whole-genome sequencing for all sperm donors — I’m not arguing for that,” she said. “But this is the abnormal dissemination of genetic disease. Not every man has 75 children across Europe.”
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She also recommended that children born from this donor’s sperm undergo genetic counseling.
“We have some children that have already developed two different cancers, and some of them have already died at a very early age,” Kasper recently told the investigators.
Up to 20% of the man’s sperm would contain that mutated gene, and any children conceived from that affected sperm would have the mutation in every cell of their body, the BBC report stated. (iStock)
There is no worldwide law that limits how many times a donor’s sperm can be used or how many children may be born from a single donor, according to the European Society of Human Reproduction and Embryology (ESHRE).
However, individual countries may have their own rules or guidelines surrounding sperm donor usage. The ESHRE recently proposed a cap of 50 families per donor as an international limit.
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Dr. Marc Siegel, Fox News senior medical analyst, commented on these developments to Fox News Digital.
“This awful story emphasizes the growing need for up-to-date genetic screening for all donors,” he said. “It also provides context for the idea that knowing the donor provides an advantage.”
“This awful story emphasizes the growing need for up-to-date genetic screening for all donors,” Dr. Marc Siegel said. (iStock)
“Genetic screening, including for oncogenes (genes that have the potential to cause cancer) is improving dramatically, and all use of sperm donations must include it,” Siegel went on.
He also called for AI to be used to improve and speed up the process.
“When a propensity for disease is suspected, the sperm must be discarded,” the doctor added.
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In a statement sent to Fox News Digital, the European Sperm Bank expressed “deepest sympathy” for the families involved.
“We are deeply affected by the case and the impact that the rare TP53 mutation has on a number of families, children and the donor. They have our deepest sympathy,” the ESP said.
The American Society of Reproductive Medicine provided its guidance on embryo and gamete donation, which stated in part that all prospective donors should undergo “appropriate genetic evaluation.” (iStock)
“ESB tests and performs an individual medical assessment of all donors in full compliance with recognized and scientific practice and legislation.”
In the case of this particular sperm donor with the TP53 mutation, the ESB noted that it occurs only in a small part of the donor’s sperm cells and not in the rest of the body.
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“In such cases, the donor himself and his family members are not ill, and a mutation of this type is not detected preventively by genetic screening,” the agency said.
When the ESB later confirmed the mutation in 2023, the donor was “immediately blocked” and authorities and clinics were notified.
“Donors should be healthy and have no history to suggest hereditary disease.”
“The clinics are responsible for informing the patients, partly because we as a sperm bank do not necessarily know the patients, and because the patients’ own treating physicians are best equipped to advise them in the specific situation,” the agency stated.
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When contacted by Fox News Digital, the American Society of Reproductive Medicine (ASRM) provided its guidance on embryo and gamete donation, which stated in part that all prospective donors should undergo “appropriate genetic evaluation.”
“Donors should be healthy and have no history to suggest hereditary disease,” the ASRM continued.
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Parents with concerns are encouraged to contact both their treating clinic and the relevant fertility authority in that country.
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Eating processed meat like ham, sausage and bacon may be linked to a higher risk of certain types of cancer, according to new research.
While health organizations have already confirmed that processed meat can contribute to colon cancer, this study looked closer at cancers in the upper digestive tract, where the link has historically been less clear.
To understand these connections, researchers from the European Prospective Investigation into Cancer and Nutrition (EPIC), one of the world’s largest long-term nutrition and cancer cohorts, tracked the health and diets of 450,112 people across Europe for an average of 14 years.
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The study group included 131,426 men and 318,686 women, according to the study’s press release.
During the follow-up period, 876 people developed stomach cancer and 215 people developed esophageal adenocarcinoma, which is cancer of the tube connecting the mouth to the stomach.
For female participants, eating both processed meat and white meat was linked to an increased risk of developing the disease. (iStock)
Researchers tracked where the stomach cancers grew, separating them into the upper part of the stomach near the throat and the lower part of the stomach.
The researchers also sorted the tumors into two categories based on how the cancer cells appeared under a microscope: intestinal, which forms more organized structures, and diffuse, in which the cells are more scattered throughout the tissue.
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After adjusting for other lifestyle factors, the researchers found that for every extra 30 grams of processed meat a person ate per day, their overall risk of stomach cancer went up by 9%. Eating that same extra 30 grams a day was also linked to a 13% higher risk of esophageal adenocarcinoma.
A standard single slice of regular deli-sliced ham or lunch meat averages around 28 grams, according to USDA data and nutritional tracking databases.
An extra 20 grams of white meat, such as chicken and turkey, was linked to a 12% higher risk of cancer in the main body of the stomach. (iStock)
An extra 20 grams of white meat, such as chicken or turkey, was linked to a 12% higher risk of cancer in the main body of the stomach, the researchers noted.
The study also revealed differences between men and women. For male participants, only processed meat showed a clear, statistically significant link to a higher risk of stomach cancer. For female participants, however, eating both processed meat and white meat was linked to an increased risk.
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These findings align with global health benchmarks, particularly those established by the World Health Organization’s International Agency for Research on Cancer.
The agency has long classified processed meat as a known human carcinogen, primarily due to its strong, well-documented links to colorectal cancer.
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However, health organizations have also consistently pointed to a potential, yet less definitive, relationship between these meats and cancers of the stomach.
Eating 30 grams of processed meat a day, or the equivalent to one slice of ham, was linked to a 13% higher risk of esophageal adenocarcinoma. (iStock)
Further scientific investigation is needed to confirm the findings and to account for other underlying risk factors, such as certain stomach infections, which could interact with dietary habits.
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A key limitation of the study is its reliance on self-reported diets, which can sometimes lead to inaccuracies in how participants recall their meat consumption over time, the researchers noted.
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The findings were published in the International Journal of Cancer.
Fox News Digital reached out to the researchers requesting comment.
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Yoga is known to boost relaxation, strength and flexibility – and now a new study has found the practice could improve cancer survivors’ quality of life.
A randomized trial led by the University of Rochester Medical Center found that a four-week yoga program significantly reduced insomnia, fatigue, anxiety and mood disturbances after cancer treatment.
The findings were presented last week at the 2026 American Society of Clinical Oncology (ASCO) Annual Meeting in Chicago.
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The study was conducted across multiple U.S. community cancer care sites, including 410 adult cancer survivors averaging 54 years of age. Around 75% were breast cancer survivors, and none of them had practiced yoga regularly within the prior three months.
A randomized trial led by the University of Rochester Medical Center found that a four-week yoga program significantly reduced insomnia, fatigue, anxiety and mood disturbances in cancer survivors. (iStock)
The participants were randomly assigned to two groups. Half of them received only standard survivorship care without the yoga, while the other half received standard care and were also enrolled in the Yoga for Cancer Survivors (YOCAS) program.
As part of the YOCAS program, the survivors completed two instructor-led 75-minute yoga sessions each week, including 18 Gentle Hatha yoga and Restorative yoga poses, breathing exercises and mindfulness training.
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Based on questionnaires completed by the patients, the survivors in the yoga group experienced “moderate-to-large” reductions in overall mood disturbance, “small-to-medium” reductions in anxiety and “medium-to-large” reductions in fatigue, the study found.
The improvements in mood and fatigue appeared to be linked to yoga’s beneficial effect on sleep quality, according to the researchers.
As part of the YOCAS program, the survivors completed two instructor-led 75-minute yoga sessions each week, including 18 Gentle Hatha yoga and Restorative yoga poses, breathing exercises and mindfulness training. (iStock)
“This indicates that cancer survivors have an option to alleviate these cancer-related side effects at the same time, without adding another drug,” lead investigator Yuri Choi, PhD, of the Wilmot Cancer Institute, University of Rochester Medical Center, in Rochester, New York, told Fox News Digital.
The study did not reveal any major safety concerns or serious adverse events related to the yoga practice.
“This indicates that cancer survivors have an option to alleviate these cancer-related side effects at the same time, without adding another drug.”
The study did have some limitations, chiefly that the findings are preliminary and have not yet been peer-reviewed for a medical publication.
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“The sample in our clinical trial was relatively homogeneous, with most participants being women (96%), breast cancer patients (75%), Caucasian (93%), and having some college or higher education (82%),” noted Choi.
“We are adapting our intervention to reach all cancer patients and survivors, including the creation of a mobile app to reach people in rural communities.”
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The research also excluded patients with metastatic cancer (whose disease had spread to other parts of the body).
The total study was only four weeks, so more research is needed to determine long-term benefits.
If the findings are confirmed by peer-reviewed publications, this could lead to recommendations for structured yoga programs as a non-drug supportive therapy for cancer survivors, the researchers noted. (iStock)
If the findings are confirmed by peer-reviewed publications, this could lead to recommendations for structured yoga programs as a non-drug supportive therapy for cancer survivors, the researchers noted.
Some yoga studios may use different names for Gentle Hatha and Restorative yoga, such as Foundations Yoga or Healing Yoga, Choi noted.
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“Survivors should also look for certified yoga instructors who have experience working with cancer patients/survivors or individuals with other challenging health conditions,” the researcher advised. “They should not be afraid to ask their oncology team for referrals to qualified instructors in their community.”
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Choi also noted that the research did not reveal whether other types of yoga, such as heated-room or rigorous-flow yoga, are safe or beneficial for cancer survivors.
The study was funded by the National Cancer Institute.
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