We all must have come across the phase: this is why women live longer than men. These are all over the social media, where men are performing more often than not, some experiments, without gears, just for fun, "in the name of science". The caption reads: this is why women live longer. However, is there really a science to it, other than the fact that women choose to do things more safely?

In the United States, women have a life expectancy of about 80, whereas men have 75. Women outlive men and this holds true regardless of the country women live, the money they make, and other factors. In fact, it is true for most other mammals too.

Dr Dena Dubal, a professor of neurology at the University of California, San Francisco told the New York Times, "It is a very robust phenomenon all over the world, totally conserved in sickness, during famines, during epidemics, even during the times of starvation."

But what are the reasons? These reasons are often more complicated and less established. It is important to note that only because women are outliving men does not mean they are living a better life. In fact, women tend to have shorter health spans, which means the number of healthy years in a person's life is less in women than men, confirmed Bérénice Benayoun, an associate professor at the U.S.C. Leonard Davis School of Gerontology.

As per a 2021 study titled, Sex differences in frailty: Comparisons between humans and preclinical models, found that women are more physically grail than men in old age. They are also more vulnerable, especially after menopause and are at more risk of developing cardiovascular issues and Alzheimer's disease because of age.

The key is in figuring out what makes one sex more resilient or vulnerable.

Genetics

For things which do not find easy explanations, scientists look for their answers in genes. Many research, including a 2020 study titled, The sex with the reduced sex chromosome dies earlier: a comparison across the tree of life, suggests that the XX set of female sex chromosomes may impact longevity. However, there has not been any clarity on how it affects longevity.

Another 2018 study titled, Female XX sex chromosomes increase survival and extend lifespan in aging mice, which was conducted by Dr Dubal's lab, looked at genetically manipulated mice with different combinations of sex chromosomes and reproductive organs. It was found that those with two X chromosomes and ovaries lived longest, followed by mice with two X chromosomes and testes. Mice with XY chromosomes had shorter life spans.

"There was something about the second X chromosome that was protecting the mice from dying earlier in life, even if they had testes. What if there was something on that second X chromosome that was in some ways a sprinkle of the fountain of youth," says Dr Dubal. While scientists have not yet looked at this factor in humans, Dr Dubal suggests that humans have the same hormones and sex chromosomes, and similar reproductive system that could corroborate the similar findings in people.

Hormones

Plenty research has shown that estrogen is responsible for longevity also effect on the immune system. The data also shows that before menopause, the female immune system tends to do better. In fact Dr Benayoun said that males tend to do much worse in response to infection.

Another 2017 study titled, Ages at Menarche and Menopause and Reproductive Lifespan As Predictors of Exceptional Longevity in Women: The Women's Health Initiative, found that women who experienced menopause later in life over the age 50 lived longer than those who experienced it earlier.

Lifestyle and Behavior

There are also disparity in behavioral patterns between men and women. This includes smoking, drinking heavily, which can contribute significantly to mortality. Women also have more "health promoting behavior", believe experts. Women are also more likely to socialize than men and thus it protects them from detrimental effects of social isolation and loneliness. In fact, a 2023 analysis published in Jama Network, titled, Widening Gender Gap in Life Expectancy in the US, 2010-2021, found that women are less likely to die by drug overdose or suicide.

Ten-year-old Myla from the UK's North Yorkshire, with severe eye strain, was diagnosed with a severe brain tumor that led to her death.

The young girl had been suffering from headaches and dizziness, which were dismissed as mere eye strain due to playing on her iPad too much.

Thinking that she needed eyeglasses, her parents took her for an eye appointment, where she was diagnosed with an aggressive diffuse midline glioma — a type of brain tumor.

Myla was diagnosed with a 7-10cm tumor and was rushed to Sheffield Children's Hospital for an operation to remove 60 per cent of the mass. The youngster underwent a grueling 30 rounds of radiotherapy but tragically passed away on January 15, The Mirror.co.uk reported.

Can Eye Strains Lead To Brain Tumors?

Healthandme spoke to health experts to understand the role of eye strain and brain tumors.

The health experts noted that although prolonged exposure to digital screens can raise the risk of vision problems, they cannot cause brain tumors.

"Eye strain is most commonly linked to prolonged screen use, poor ergonomics, or uncorrected vision, and in the vast majority of cases, it is not a sign of brain cancer," Dr. Parul Maheshwari Sharma, Ophthalmologist and Principal Director & HOD - at Fortis Gurugram, told HealthandMe.

"The likelihood of experiencing eye strain being an indication of brain cancer is minimal," added Dr. Mahipal Singh Sachdev, Chairman & Medical Director, Centre For Sight Group of Eye Hospitals.

The doctors explained that brain tumors are rarely present as simple eye strain; they are usually associated with additional symptoms such as:

• persistent headaches,
• double vision,
• vision loss,
• vomiting,
• neurological deficits.
• convulsions,
• vision changes.

What Is Eye Strain?

Eye strain, also referred to as digital eye strain or computer vision syndrome, is caused by staring at screens for extended periods of time and decreased blinking.

It generally occurs due to benign factors such as excessive screen time, dry eye, or uncorrected vision.

While prolonged screen use can cause discomfort, dry eyes, and temporary blurred vision, it does not lead to the development of cancer.

"There is no evidence to suggest that screen-induced eye strain can cause brain tumors," Dr Sharma said.

"Although there may be visual changes due to a tumor that involves the optic nerve or hypothalamus, simple eye strain is not indicative of brain tumors and would not be considered an early warning of a brain tumor. There is an extremely low probability that eye strain will be due to a brain tumor," Dr. Sachdev told HealthandMe.

However, the experts agreed that long screen time can lead to severe eye strain.

Red Flags One Should Not Ignore For Brain Tumors

Brain tumors are generally attributed to genetics, exposure to radiation, or other unknown factors.

Numerous types of red flags could indicate the presence of a serious neurological disorder. Some examples include

• chronic or worsening headaches, especially if severe in the morning,
• recurrent unexplained vomiting,
• seizure activity,
• sudden changes in vision, such as double vision or complete loss of vision,
• trouble speaking clearly,
• weakness in the arms or legs,
• drastic personality changes.

Higher-risk patients include:

• those with a history of radiation exposure to the brain,
• specific genetic conditions,
• those with a family history of brain cancer.

Also read: 12-Year-Old Teen Dies From Rare Brain Tumor After Unusual Early Signs, Grieving Mother Urges Parents To Watch For Subtle Symptoms

Steps to Reduce Eye Strain

To help combat eye fatigue, individuals can adopt some simple habits, such as

• Following the 20-20-20 rule: every 20 minutes, look at something 20 feet away for 20 seconds.
• Place your computer monitor at or below eye level and keep a comfortable distance from the computer.
• Adjust your screen brightness and contrast to comfortable levels and use adequate room lighting.
• Remember to blink often or use artificial tears to keep your eyes moist.
• Take screen breaks, limit the duration of time you are using your computer, or limit the continuous use of your computer.
• Make sure you are using the correct prescription glasses and consider using an anti-glare screen, which can also help relieve discomfort and protect your eyes from long-term effects.

Ladies, does it ever happen to you that you are not on your period, not PMSing, and still feel moody and upset? Well, as it turns out, experts say that there could be a very simple reason for this. According to researchers at the University of Connecticut, even mild dehydration could be responsible for mood changes in women. Not only this, even 1.36 per cent dehydration can affect your mood, ability to think and energy levels. The Daily Mail notes that a loss of 1.5 per cent of normal water volume levels in the body can be classified as mild dehydration, and its adverse effects can linger for some time.

Read more: The Health Problems Women Normalise, But Gynaecologists Do Not

How does dehydration affect women?

In women, the adverse effects of dehydration can be serious. Experts say that the effects are more intense in women, and they came to this conclusion after analysing the results of tests, which revealed that it does not matter if a person walks for 40 minutes on a treadmill or is in a state of rest — if an individual is even slightly thirsty, the adverse effects will be the same.

Research shows that even 1.36 per cent dehydration is enough to cause the following problems:

1. 8 per cent rise in hostility and anger
2. 12 per cent dip in vigour
3. 17 per cent increase in fatigue
4. 45 per cent dip in concentration
5. 19 per cent worsening of mood
6. 58 per cent dip in understanding simple tasks
7. Headaches worsening two fold

Is thirst the same as dehydration?

Lead researcher of the study, Lawrence Armstrong, noted that a sensation of thirst does not appear until a person is one or two per cent dehydrated. By then, it starts to set in and act up, adversely impacting how the mind and body perform. Dehydration can affect everyone, which is why it is just as important for people in desk jobs to stay hydrated as it is for marathon runners.

Read more: Three Health Checks Every Woman Should Do Each Month, According To Experts

In this research, experts put participants through a series of tests evaluating their concentration, vigilance, reaction time, reasoning, memory and learning. The results were then compared with those of people who were not dehydrated. In younger women, mild dehydration resulted in fatigue, headaches and concentration difficulties. Women also found basic tasks more difficult to execute than usual. On the other hand, young men noted some difficulty in performing mental tasks — they experienced anxiety, fatigue and tension in the process. Mood changes were more prominent in women than in men.

The oral microbiome is the community of bacteria, fungi, and other microorganisms that naturally live in the mouth — on the teeth, gums, tongue, and cheeks. More than

700 species are known to exist, most of which are harmless and many beneficial.

However, problems arise when harmful bacteria outnumber protective ones, leading to gum inflammation or periodontal disease. During pregnancy, hormonal changes increase blood flow to the gums and alter immune responses. As a result, many women notice bleeding, swelling, or sensitivity in the gums — a condition known as pregnancy gingivitis.

This is common and reflects physiological changes rather than poor hygiene.

The Mouth's Connection To The Placenta

Pregnancy is a systemic state in which the immune system, circulation, and inflammation are closely interconnected. Chronic gum inflammation can release inflammatory mediators into the bloodstream.

In research settings, certain oral bacteria have also been detected in placental tissues from complicated pregnancies. This suggests a biological link between oral health and

placental function, although the exact pathways are still being studied.

Importantly, this relationship reflects association rather than direct causation.

Why Does Placental Health Matter?

The placenta is an active organ that regulates oxygen and nutrient transfer, hormone production, and immune protection for the developing baby.

Healthy placental development supports:

• Efficient oxygen and nutrient delivery
• Balanced hormone production
• Protection against infections
• Steady fetal growth

What Changes In Oral Health Are Normal During Pregnancy?

Up to 60–75 percent of pregnant women experience some degree of gum inflammation. Common changes include:

• Bleeding while brushing
• Swollen or tender gums
• Increased plaque buildup
• Persistent bad breath

Can Oral Health Really Affect Pregnancy Outcomes?

Research from India and globally shows associations between periodontal disease and higher risks of preterm birth, low birth weight, and preeclampsia. Meta-analyses

suggest a modest increase in risk (around 1.5–2 times).

However, pregnancy complications are multifactorial. Oral disease alone does not directly cause these outcomes. Genetics, nutrition, metabolic health, and placental

biology all play important roles.

Treating gum disease improves oral health and reduces inflammation, though studies show mixed evidence on whether it directly lowers preterm birth risk. The goal is

prevention, awareness, and overall maternal health.

How Do You Support Healthy Oral Microbiome During Pregnancy?

Daily oral care:

• Brush twice daily with gentle pressure
• Use a soft-bristled toothbrush
• Clean between teeth once daily
• Rinse your mouth after vomiting to protect enamel

• Calcium-rich foods like curd and ragi support dental health
• Vitamin C from amla, guava, and citrus helps gum healing
• Fibre-rich foods support saliva flow and microbial balance
• Hydration and lifestyle
• Drink adequate water
• Limit frequent sugary snacks
• Avoid tobacco in all forms

Pregnancy already carries emotional and physical changes, and dental symptoms can add anxiety. Support from partners and family members helps reduce mental load.

Stress can influence immunity and inflammation. Adequate rest, gentle activity such as walking or prenatal yoga, and open communication with healthcare providers

support both oral and overall health.

Warning Signs: When Should You Contact A Doctor Or Dentist?

Seek professional advice if you notice:

• Severe tooth pain or swelling
• Pus, fever, or difficulty chewing
• Bad breath that does not improve
• Persistent gum bleeding for two weeks

Pregnancy is a time when different systems of the body work in close coordination. Oral health, immune balance, and placental function are part of the same continuum.

Gentle attention to gum health is not about perfection. It is about creating supportive conditions for a healthy pregnancy and a healthy baby.