Health
Study Links Hormonal IUDs to Slightly Increased Breast Cancer Risk in Young Women
Copenhagen, Denmark — A recent study from the Danish Cancer Institute has found that hormone-releasing intrauterine devices (IUDs) may be associated with a slightly higher risk of breast cancer among young women. The large-scale study, published in the Journal of the American Medical Association (JAMA), has prompted health professionals to reconsider the risks and benefits of hormonal contraceptives.
The research examined health outcomes for around 79,000 women, aged 15 to 49, who used hormonal IUDs, such as the Mirena coil, compared to a similar group of women who did not use any form of hormonal birth control. The women were monitored over an average of 6.8 years. While the overall risk of developing breast cancer remained low, the study found that hormonal IUD users faced a slightly higher risk—about 14 additional cases of breast cancer per 10,000 women.
Hormonal IUDs, which release a progesterone-like hormone to prevent pregnancy, are commonly used across Europe, with about 8.1% of reproductive-age women relying on this form of contraception. Unlike copper IUDs, which do not involve hormones, devices like the Mirena coil work by slowly releasing hormones directly into the uterus. Many medical professionals had previously believed this localized hormone release posed a lower risk of breast cancer compared to oral contraceptive pills, which expose the body to higher levels of hormones.
However, the new findings challenge this assumption. “The results of this study are highly unexpected,” said Dr. Channa Jayasena, a reproductive endocrinologist at Imperial College London, who was not involved in the research.
The study has limitations, as it did not account for lifestyle factors like smoking, alcohol consumption, and obesity, all of which are known breast cancer risk factors. These unmeasured variables could influence the study’s results, but the data has nonetheless raised concerns.
Doctors and researchers are now advising that healthcare providers include potential breast cancer risks when discussing hormonal IUDs with patients. “My advice for women is that breast cancer risk caused by [IUDs] is not established but warrants a closer look,” Jayasena added.
This is not the first study to suggest a link between hormonal contraceptives and breast cancer. Last year, researchers at the University of Oxford found that progestogen-only contraceptives, regardless of their form, were associated with a slight increase in breast cancer risk. Experts suggest that the increased risk from IUDs may be similar to that posed by oral contraceptives.
Despite the findings, there remains broad medical consensus that the benefits of hormonal contraception outweigh the risks. Dr. Mangesh Thorat, a breast cancer surgeon and researcher at Queen Mary University of London, noted that certain types of IUDs have been shown to reduce the risks of cervical, endometrial, and ovarian cancers.
Thorat also highlighted that contraceptive risks change with age, suggesting that women nearing 40 should consider non-hormonal alternatives in consultation with their healthcare providers.
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
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Health
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