Health
Male fertility rates crash as doctors reveal health threats: ‘Something very wrong’
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Scientists and physicians agree that there’s been a general decline in male fertility — but they aren’t sure why.
Social media buzz has pointed to a few environmental exposures as potential factors, including cellphones and electric vehicles.
But the reality is “more complicated” than that, according to experts who recently spoke to National Geographic.
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Although it’s not clear whether the decline is at a stage where it should be considered a crisis, numbers show that overall fertility — demographically measured by the number of babies born compared to women of child-bearing age — has decreased.
Scientists and physicians agree that there’s been a general decline in male fertility. (iStock)
Dr. Alex Robles of the Columbia University Fertility Center in New York confirmed that clinical practitioners are “certainly seeing more couples where the male factor contributes to infertility.”
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“At least one-third of couples we evaluate have some male component,” he told Fox News Digital.
A 2017 meta-analysis published in Oxford Journals: Human Reproduction Update found that sperm counts in Western countries have declined by almost 60% globally since 1973. The 2023 update confirmed these same results.
Urologists can track declining fertility in sperm quality, while demographic data uses the number of babies born compared to women of child-bearing age as a benchmark, according to National Geographic. (iStock)
Lead study author and epidemiologist Hagai Levine warned that this trend could lead to human extinction if it isn’t addressed.
“This is the canary in the coal mine,” Levine, public health physician at the Hebrew University-Hadassah Braun School of Public Health, told National Geographic. “It signifies that something is very wrong with our current environment, as lower sperm counts predict morbidity and mortality.”
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These findings have been contradicted by other studies, however. A 2025 Cleveland Clinic analysis of studies from the last 53 years found sperm counts to be steady.
“There is no evidence to suggest that this decline is the cause of a precipitous decline in the ability to cause pregnancies,” primary study author Scott Lundy, a reproductive urologist at Cleveland Clinic, told National Geographic. “Most men, even with a modest decline in sperm counts, will still have no issues conceiving.”
Potential factors of decline
Multiple lifestyle factors can lead to a decline in male fertility, Robles noted, including obesity, smoking and diet, as well as environmental exposures and delayed parenthood.
National Geographic also reported that heavy drinking and marijuana use directly contribute to declining fertility and that quitting these habits, while also exercising and losing weight, can help.
Smoking of any kind can contribute to a decline in fertility, according to experts. (iStock)
Systemic inflammation, infection and disease can also have a “big, profound effect on the current status of fertility,” Lundy told National Geographic.
Those who are getting over a fever from an infection, like the flu or COVID, will have a “drastically lower” sperm count for three months, he said.
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Male infertility can also be a marker of overall health, according to Robles. “Poor semen parameters are associated with other medical conditions and may signal underlying metabolic, hormonal or environmental issues,” he told Fox News Digital.
Experts recommend seeing a doctor to discuss fertility concerns instead of relying on the internet. (iStock)
Allan Pacey, deputy dean of the Faculty of Biology, Medicine and Health at the University of Manchester, told National Geographic that the decline could be caused by increased use of contraception, as well as men waiting longer to have children or choosing not to have them at all.
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Microplastics have also been raised on social media as a potential culprit, but the effects are unclear, according to experts.
There is some evidence of endocrine-disrupting chemicals — which are substances found in reusable plastics and some disposable products — altering male fertility, Lundy revealed to National Geographic.
Myths busted
Concerns have circulated on social media that keeping a cellphone in a front pocket could harm male fertility. While Lundy said such an effect is biologically possible, there is currently no scientific evidence supporting the claim.
Another common myth is that infertility is mostly a women’s issue, Robles noted, but male factors contribute to about one-third to one-half of all cases.
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The claim that taking supplements can boost sperm counts is another common myth, he said, adding that it’s not backed by strong scientific evidence.
“Men should focus on factors that we know matter: maintaining a healthy weight, avoiding tobacco, limiting alcohol and managing chronic health conditions,” Robles advised.
One common myth is that infertility is mostly a women’s issue, but male factors contribute to about one-third to one-half of all cases. (iStock)
Experts recommend seeing a urologist to address fertility concerns. Robles said his approach begins with an evaluation, semen analysis, hormonal testing and medical history, while also exploring lifestyle factors.
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In addition to traditional treatment options, Robles said his fertility center also uses advanced tools that incorporate AI and robotics.
“Technologies like this are expanding options for patients who previously had very limited paths to biological parenthood,” he said.
Health
The ‘1776 Diet’: What Americans really ate during the nation’s founding
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Many of the American colonists’ eating habits have made a comeback in recent years. They ate minimally processed, locally sourced whole foods and regularly incorporated organ meats into their meals.
Livestock and many Old World crops had already been introduced to North America by European explorers and settlers during the centuries before the nation’s founding.
Early settlers adapted European cooking traditions using ingredients available in North America, the Center for the Study of the Presidency and Congress (CSPC) reported.
Indigenous peoples introduced corn to the colonists, and it became a core ingredient in many of their recipes. Beans, squash, and potatoes were among the other crops that became incorporated into colonial cooking, according to the CSPC.
“Cornmeal appeared in dishes such as hasty pudding — a thick porridge similar to polenta — and johnnycakes, simple griddle cakes that were popular from New England to the South,” History Facts reported.
Cornmeal Johnnycakes, roast pork and cream cheese are distinctly early-American foods the CSPC has recipes for on its website.
Corn became a staple of early colonists’ diets after Indigenous peoples introduced the crop to the settlers and taught them how to cultivate it. (iStock)
Regional customs and crops greatly influenced what the colonists ate. Rice and okra grew well and were plentiful in the South, where French and African influences also shaped eating habits.
Dutch, English and German immigrants largely settled in the north and established the region’s culinary traditions.
Seafood such as rockfish and crab dominated the diets of early Maryland settlers, NPR reported.
Meat was a status symbol, local food historian Joyce White told the publication. Beef was prized, and chicken was often saved for egg production.
“If it’s your pig or cow coming from your plantation, you don’t want to waste it,” White said.
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Thomas Jefferson was known for his decadent tastes and a fondness for French wine and macaroni and cheese. Records show that black-eyed peas, turnip greens and ham were also part of the Founding Father’s diet.
Salted and preserved fish and meats, including bacon, sausage, liver pudding and offal, were staples of working-class people’s diets, while the upper classes indulged in such luxuries as white flour and sugar.
Interest in these traditional foods has resurfaced in recent years as some Americans seek diets centered on whole, minimally processed ingredients.
Founding Father Thomas Jefferson was known for his continental tastes and enjoyed French wine and macaroni and cheese. (iStock)
Advocates of the Make America Healthy Again movement, for instance, have promoted organ meats, or offal, as some of the cheapest and most nutrient-dense foods people can eat.
Stews that evolved as ingredients became available were also common an America’s early days.
The amount of alcohol the colonists consumed was “staggering,” Adrian Miller, author of “The President’s Kitchen Cabinet,” told NPR.
“They were very open about how much they were drinking,” he said.
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George Washington wrote a recipe for “small beer” in a journal he kept as a young colonel in charge of the Virginia militia during the Seven Years’ War, Fox News Digital previously reported. The New York Public Library houses the journal.
“Small beer,” according to the library, derives its name from the small amount of alcohol it contains. It was quick to make, safer to drink because the brewing process helped eliminate bacteria in the water — and it was an “everyday, mainstay beverage,” the library reported.
“While the 1776 Diet has some positives — such as emphasizing whole foods, home cooking and fewer ultra-processed foods — it’s not one I’d recommend following too literally,” registered dietician Lisa R. Young, adjunct professor of nutrition at New York University, told Fox News Digital.
Working-class colonists would often save chickens for their eggs, rather than consuming their meat. (iStock)
“Colonial Americans often ate foods like salted ham, organ meats and other preserved meats out of necessity,” she said. “Today, we know it’s best to limit processed and cured meats because they’re high in sodium and saturated fat, and organ meats, while nutrient-dense, are best eaten in moderation due to their high cholesterol content.”
Focus on the healthiest aspects of the 1776 diet, Young recommended. That includes plenty of fruits and vegetables, beans, whole grains, fish and lean proteins.
“Of course, you can emulate the Founding Fathers’ diet for the week of the 250th anniversary,” she said. “What you eat for a day or a week won’t matter much in the scheme of things.”
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Some of the Founding Fathers drank a lot of ale, often in the morning, Young noted.
“We shouldn’t emulate that,” she said.
Health
Fourth of July fireworks pose hidden health risk for certain Americans, experts warn
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Fireworks have been a quintessential part of Fourth of July celebrations across the nation for generations.
But as Independence Day festivities light up the night sky, the colorful displays can also pose serious health risks — especially to the lungs.
Nearly 300 million pounds of fireworks are released into the atmosphere each year in the U.S., according to the American Lung Association. This creates smoke filled with tiny particles, as well as gases like sulfur dioxide, carbon dioxide and carbon monoxide, which are “very harmful to our lungs.”
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The smoke from fireworks can also release harmful metals, like aluminum, manganese and cadmium, into the air.
Some illegal fireworks may contain lead, which the association describes as “extremely dangerous” due to its potential to cause lasting health damage.
Attendees watch the Independence Day fireworks display along the National Mall in Washington, D.C. (Probal Rashid/LightRocket via Getty Images)
“Inhaling any of these chemicals can irritate the lungs, making it hard to breathe and causing serious health problems, which is why it is important to avoid firework smoke whenever possible,” the group said in a public advisory.
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Air pollution levels increase by an average of 42% on the Fourth of July, according to a 2015 study.
Smoke from fireworks can worsen symptoms and cause flare-ups in those who have asthma or chronic obstructive pulmonary disease (COPD).
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Fine particle pollution has also been linked to more serious health consequences, including heart attacks, stroke, lung cancer and premature death, according to the American Lung Association.
The organization warned that children, older adults and pregnant women, as well as people with lung and heart disease, are especially vulnerable.
Smoke from fireworks can worsen symptoms and cause flare-ups in those who have asthma or chronic obstructive pulmonary disease. (iStock)
Dr. Afif El-Hasan, member of the Lung Association’s board of directors, shared some advice for high-risk fireworks spectators in an interview with Fox News Digital.
Instead of using fireworks at home, El-Hasan recommends watching them from a distance.
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People with asthma who use a rescue inhaler should keep it close at hand in case fireworks trigger wheezing or other symptoms, the expert advised. Wearing a well-fitting N95 mask can also help reduce exposure to fine particles from fireworks smoke and debris.
“If you are familiar with the area and the wind patterns, try to be upwind from the fireworks display and avoid areas where smoke may accumulate,” he said.
An expert recommends watching fireworks from a distance to avoid exposure to air pollution. (iStock)
The expert also recommends attending fireworks events with friends or family, so someone is available to help if a medical emergency arises.
“Make sure you have taken all of your preventative medication before a fireworks show,” El-Hasan advised. “If possible, take a car to the fireworks display. Try to park as close as possible to the event in case you have to get to the car quickly.”
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The expert also recommends drinking water immediately after the show to clear the upper airway. Changing and washing clothes upon returning home can also help to prevent smoke particles from accumulating in the home.
If case of shortness of breath or chest pain, it’s important to seek medical care immediately.
Health
Scientists discover possible link between 9/11 and accelerated aging
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A study of World Trade Center responders found that PTSD is associated with molecular changes linked to accelerated biological aging and a higher risk of chronic disease.
The study, led by Stony Brook University in New York, could offer new clues to the long-term physical health effects of post-traumatic stress disorder.
The researchers tested blood samples from 393 WTC responders, collected approximately 18 years after the September 11, 2001, attacks, according to a university press release.
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Out of the sampled responders, 232 were diagnosed with PTSD and 161 were not. Between the two groups, 114 proteins and seven metabolites were significantly different.
Firefighter Gerard McGibbon, of Engine 283 in Brownsville, Brooklyn, prays after the World Trade Center buildings collapsed on September 11, 2001. (Mario Tama/Getty Images)
In particular, the researchers detected changes in blood markers linked to brain function, immune activity, energy metabolism, protection against cell damage and how cells communicate and repair tissues.
Also reported were signs of accelerated biological aging in multiple organs — including the heart, kidneys, liver and lungs — among responders with PTSD.
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These discoveries could help explain why people with long-term PTSD are at greater risk for chronic conditions such as heart disease, lung disease, cognitive decline and other age-related illnesses.
“This study found that chronic PTSD is associated with long-lasting biological changes throughout the body, affecting multiple organs and biological systems decades after their traumatic exposure,” lead study author Benjamin Luft, director and principal investigator at the Stony Brook WTC Wellness Program, told Fox News Digital.
“Traumatic experiences can produce lasting biological changes that persist for decades.”
The study reinforces the view that PTSD is a “whole-body illness” rather than simply a mental health disorder, he noted.
“Traumatic experiences can produce lasting biological changes that persist for decades,” Luft said. “These changes appear to accelerate aspects of biological aging and may increase the risk of many chronic diseases.”
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Several proteins that are critical for healthy brain function were also altered in those with PTSD, the researchers found.
“Many of these proteins play critical roles in helping brain cells communicate with one another, repair damage and maintain healthy connections that support memory and thinking,” Luft said.
A New York firefighter is pictured amid the rubble of the World Trade Center following the 9/11 attacks in 2001. (Universal History Archive/Universal Images Group via Getty Images)
The study – which was funded in part by the CDC, the National Institute for Occupational Safety and the National Institutes of Health – was published in Nature Communications.
Luft said the findings should be viewed with “cautious optimism.”
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“The research provides compelling evidence that PTSD is associated with long-lasting biological changes throughout the body, including signs of accelerated aging, altered metabolism and changes in proteins involved in brain health,” he said.
“These findings strengthen the growing recognition that PTSD is not simply a mental health disorder, but a condition that can have lasting effects on physical health as well.”
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Dr. Marc Siegel, Fox News senior medical analyst, was not involved in the study but called the results “fascinating.”
“This speaks to the complex reality that PTSD is not an isolated psychiatric event due to emotional trauma alone, but that it is also tied in with physical trauma,” he told Fox News Digital. “The stress is both emotional and physical, and leads directly to immune dysregulation and aging processes.”
“These findings strengthen the growing recognition that PTSD is not simply a mental health disorder, but a condition that can have lasting effects on physical health as well,” the researcher said. (iStock)
“The chronic diseases that resulted from high exposure in the aftermath of the 9/11 World Trade Center attacks were conjoined in terms of the impact on physical and emotional well-being, longevity and effects on multiple organ systems, as well as core metabolic and immunological processes,” the doctor added.
Study limitations
There were some limitations to the findings, the researchers noted.
“Because all measurements were taken at one point in time, the research can only show an association — not that PTSD directly caused the changes,” Luft noted.
“We are currently doing studies in these patients examining multiple time points to see whether the changes in specific proteins and metabolites precede clinical changes.”
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Also, because the study was done on a unique population – World Trade Center responders who experienced very specific trauma and environmental exposures – the findings may not apply to everyone with PTSD, “such as combat veterans, survivors of abuse or people who experienced other types of trauma.”
Several proteins that are critical for healthy brain function were also altered in those with PTSD, the researchers found. (iStock)
Women are not well-represented in the study, comprising only 10% of responders.
“Blood tests cannot tell us exactly what is happening inside the brain,” Luft said. “Although many of the altered proteins are related to brain function, blood measurements are only an indirect reflection of processes occurring in the brain.”
Looking ahead
Additional studies are needed to determine whether these blood markers can predict disease progression or treatment response.
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“From a public health and policy perspective, the study reinforces the importance of recognizing PTSD as a chronic medical condition with significant long-term health implications,” Luft said.
“Investing in early diagnosis, comprehensive treatment and long-term follow-up for trauma survivors, including our first responders and veterans, may improve quality of life while reducing the burden of chronic disease.”
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