Health
Study Links Sperm Quality to Men’s Lifespan, Experts Say
Men with higher-quality sperm may live longer lives, according to a new study that suggests semen health could serve as a key indicator of overall well-being.
The study, published in the journal Human Reproduction, analyzed data from nearly 80,000 Danish men over a follow-up period of up to 50 years. The participants had undergone semen quality assessments in laboratories as part of fertility evaluations.
Researchers examined several factors, including semen volume, sperm concentration, and the percentage of motile sperm—those that move efficiently and have a normal shape. Their findings revealed that men with higher numbers of motile sperm had life expectancies two to three years longer than those with lower counts.
“In absolute terms, men with a total motile sperm count of more than 120 million lived 2.7 years longer than men with a total motile count between zero and five million,” said Dr. Lærke Priskorn, senior researcher at Copenhagen University Hospital and the study’s lead author.
She emphasized that the lower the semen quality, the lower the life expectancy—a pattern that was not explained by pre-existing health conditions or education levels.
Semen Quality as a Health Indicator
Experts believe that semen quality could act as a biomarker for overall health in men. Previous research cited in the study found that men with lower sperm concentration were hospitalized an average of seven years earlier, indicating that impaired fertility may be linked to shorter and less healthy lives.
“The current findings add to the growing body of research showing that semen quality is an important marker of current health and predictive of future health across a man’s lifespan,” said Dr. Germaine Buck Louis, dean of the College of Health at George Mason University in the U.S.
She noted that some scientists have even suggested semen quality be considered the sixth vital sign, alongside temperature, heart rate, respiratory rate, blood pressure, and oxygen saturation.
Possible Causes and Future Research
While the study does not pinpoint the exact reasons behind the connection between sperm health and longevity, experts suggest environmental exposures and oxidative stress may play a role, as they impact both reproductive and overall health.
“Without knowing the exact causes of infertility and the specific cell functions affected, it is difficult to develop medical interventions or new drugs to address the problem,” said Dr. Dolores Lamb, co-director of the research learning center at Children’s Mercy Kansas City.
She added that research is ongoing to better understand the link between infertility and increased health risks in men.
As scientists continue to explore the long-term implications of semen quality, the study underscores the importance of reproductive health as a window into overall well-being, potentially shaping future healthcare practices and preventive strategies.
Health
Global Mental Health Cases Near 1.2 Billion as Anxiety and Depression Drive Sharp Worldwide Rise
A major global analysis has found that mental health conditions have surged to an estimated 1.2 billion people worldwide, driven largely by steep increases in anxiety and depression over the past three decades.
The findings, published in The Lancet as part of the Global Burden of Disease Study 2023, show that the number of people living with mental disorders has almost doubled since 1990, marking a 95% rise. Researchers say major depressive disorder and anxiety disorders have seen even sharper growth, increasing by 131% and 158% respectively, making them the most prevalent mental health conditions globally.
The report describes mental illnesses as widespread conditions that create long-term disability and significant human suffering. It also highlights broader consequences for economies and public services, including reduced productivity, lower workforce participation and increasing pressure on health and welfare systems.
Researchers estimate that in 2023 alone, around 620 million females and 552 million males were affected by mental health conditions. While the overall burden is rising across both sexes, the study points to notable differences in the types and prevalence of disorders.
Among women, depression and anxiety were the most commonly reported conditions, alongside higher rates of eating disorders such as anorexia nervosa and bulimia nervosa. The report links this disparity to a mix of biological, social and structural factors, including exposure to domestic violence, sexual abuse, gender inequality and reproductive health-related changes.
In contrast, neurodevelopmental and behavioural disorders, including attention deficit hyperactivity disorder (ADHD), conduct disorder and autism spectrum conditions, were more frequently diagnosed in men.
Teenagers aged 15 to 19 were identified as the group experiencing the highest mental health burden globally, raising concerns about early onset of conditions and insufficient preventive care for young people.
The study identifies several key risk factors associated with mental illness, including childhood sexual violence, bullying and intimate partner violence. These factors are strongly linked to conditions such as depression, schizophrenia, bipolar disorder and anxiety disorders. However, researchers note that such exposures have remained relatively stable over time and account for only a portion of the overall rise.
According to the authors, broader drivers are likely contributing to the increasing prevalence of mental disorders. These include genetic and biological influences, poverty, inequality, and the growing impact of global crises such as armed conflict, pandemics, natural disasters and climate-related stress.
While mental health conditions have long been a leading cause of disability worldwide, the report warns that the situation is worsening. At the same time, health systems have not expanded services at a pace matching demand.
The authors caution that the gap between rising need and limited access to care is becoming more pronounced, leaving millions without adequate treatment or support.
Health
Europe Records Sharp Rise in Sexually Transmitted Infections, ECDC Warns
Health
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