Pregnancy is accompanied by a lengthy list of do's and don'ts—take prenatal vitamins, no alcohol, exercise carefully, and eat well. But what about when an unplanned health issue presents itself, such as the necessity for a mammogram? For most women, this might not even be something they think about until they are in a position where breast cancer screening is an option.

Perhaps you're over 40 and in need of your yearly mammogram, or perhaps you have a history of breast cancer in your family and you want to keep your screenings current. More emergently, you've found a lump in your breast. So, can you have a mammogram when pregnant? The answer is yes, but there are several things to consider.

Pregnancy creates substantial hormonal changes that affect the body, as well as breast tissue. Estrogen and progesterone's rise causes the breasts to expand and condition to produce milk, which results in denser tissue. This increased density is more challenging to detect any abnormalities with using mammograms. Even post-delivery, should the woman be breastfeeding, milk-filled glands can also make the breasts denser and, as a result, make mammogram readings less clear.

While 3D mammograms have improved imaging technology to help navigate dense breast tissue, doctors often suggest postponing routine screening mammograms until after pregnancy if there are no symptoms or high-risk factors. However, if a lump or abnormality is found, your doctor may recommend immediate diagnostic imaging.

When Is a Mammogram Necessary During Pregnancy?

Mammograms are not done routinely if a woman becomes pregnant, yet there are specific situations where one might be unavoidable. Breast cancer in pregnancy does occur—1 in 3,000 times—but it's not common. If a lump is detected by a woman, she has constant breast pain and no explanation, or she is at high risk (e.g., strong history of breast cancer in her family or genetic defect such as BRCA1 or BRCA2), a physician will order a mammogram.

The process itself takes very little radiation exposure. The radiation employed by a mammogram is concentrated on the breast, and there is little to no radiation that reaches other areas of the body. A lead apron is also placed over the belly to shield the unborn child.

Alternative Breast Imaging Options During Pregnancy

For pregnant women requiring breast imaging, physicians may initially suggest an ultrasound. In contrast to a mammogram, an ultrasound is not done with the use of radiation and is deemed safe for pregnant women.

An ultrasound of the breast can establish whether a lump is a fluid-filled cyst or a solid tumor that needs further investigation. Yet ultrasounds are not always diagnostic, and in certain instances, a mammogram or biopsy is needed to determine or rule out cancer.

Magnetic Resonance Imaging (MRI) is also an imaging choice but has some drawbacks. The majority of breast MRIs employ a contrast material called gadolinium, which is able to pass through the placenta and to the fetus. Although risks are not entirely clear, physicians usually do not use MRI with contrast unless necessary. Some practitioners may offer an MRI without contrast as an option.

What If You Find a Lump In Your Breast During Pregnancy?

Breast changes throughout pregnancy are normal, but finding a lump should never be taken lightly. If you notice a lump, alert your medical provider right away. They will conduct a clinical breast exam and potentially have you get an imaging study such as an ultrasound or mammogram to see whether anything needs to be done.

If imaging indicates a suspicious mass, a biopsy can be suggested. Core needle biopsy is the most frequently used and is safe during pregnancy. It consists of numbing the skin with local anesthetic and inserting a hollow needle into the area to obtain a small sample of tissue to be tested.

Breast Cancer Treatment During Pregnancy

In the extremely uncommon event of a diagnosis of breast cancer while pregnant, therapy will be determined by the nature and extent of cancer and by how far along in pregnancy one is. The most frequent form of treatment is surgery—either mastectomy (surgical removal of the entire breast) or lumpectomy (surgical removal of the lump)—which is usually safe while pregnant.

Chemotherapy is also possible but usually only attempted after the first trimester, when it can damage developing fetal tissue. Radiation therapy is not used during pregnancy and is typically deferred until after giving birth. Hormonal therapy and targeted therapies are also omitted until after giving birth.

Can I Get a Mammogram While Breastfeeding?

Yes, you can have a mammogram while you are breastfeeding. The radiation in a mammogram does not impact breast milk or hurt the baby. But breast density is still high during lactation, and this might complicate detection of abnormalities. To enhance image quality, physicians usually advise breastfeeding or pumping 30 minutes prior to the mammogram.

Routine screening mammograms are usually delayed in pregnancy unless there is a high-level concern.

If a lump is detected, an ultrasound is typically the initial imaging study done, with a mammogram being a consideration if additional assessment is necessary.

• Pregnancy mammograms utilize minimal radiation and are safe when required.
• Breast MRI with contrast is usually avoided in pregnancy.
• Breast biopsy, when necessary, is safe during pregnancy.

If breast cancer does develop during pregnancy, there are available treatment options that can be adjusted to keep the mother and infant safe.

Pregnancy is a period of significant change, and health issues particularly those involving breast health, are anxiety-provoking. Routine mammograms are typically postponed until after giving birth, but diagnostic testing can be done if necessary. The best you can do is discuss changes you notice in your breasts with your healthcare provider in an open manner. Early detection and prompt treatment can make a very big difference in the health of both mother and fetus.

We all indulge in tasty meals from time to time and with the holiday season approaching, many of us will be enjoying larger-than-usual meals. But going overboard can raise the risk of certain health problems, including heart attacks, especially for those with chronic health conditions.

“If you’re young and healthy, a single large meal is unlikely to trigger a heart attack, but for the right population, it can certainly increase the risk,” said Ameya Kulkarni, a cardiologist at Kaiser Permanente, as per The Washington Post.

Heart disease is the top cause of death in the United States, with someone experiencing a heart attack roughly every 40 seconds. That adds up to over 800,000 people annually, according to the CDC.

Heavy Meals Can Trigger Heart Risk

In 2000, a study abstract presented at an American Heart Association conference revealed that an “unusually heavy meal” may increase the risk of a heart attack by about four times in the two hours after eating, which the authors called the “hazard period” - particularly in those with pre-existing heart disease.

The participants described their meals as “heavy.” The abstract wasn’t published in a peer-reviewed journal.

Similarly, a 2005 analysis of 17 studies found that heavy physical activity, eating, and emotional stress were some of the common triggers reported before a heart attack. Men were more likely to report exertion and eating, while women often reported emotional stress.

Big Meals Stress The Heart

Eating a large, high-fat, high-calorie meal is similar to extreme physical exertion for your heart. To digest all that food, blood is redirected to your digestive system. Blood vessels tighten, heart rate and blood pressure rise, and blood flow to the heart can be limited, said Steve Kopecky, a cardiologist and professor at Mayo Clinic.

That spike in blood pressure can rupture cholesterol plaques in the arteries, forming clots. Even the fatty meal itself — think buttered potatoes, gravy, and heavily marbled meats — can make your blood more prone to clotting.

“These factors together can lead to a heart attack a few hours later,” Kopecky explained.

Who Is Most At Risk?

Certain conditions raise heart attack risk, including diabetes, high cholesterol, high blood pressure, and obesity, as well as lifestyle habits like poor diet, inactivity, or smoking history. For people with these risk factors, a large meal could act as a trigger, just like emotional stress or heavy physical activity, such as shoveling snow, said Kulkarni, also president of the AHA’s Greater Washington Region Board of Directors.

Heart Attack Warning Signs

• Chest pain or pressure in the center or left side of the chest that persists for several minutes or comes back.
• Pain or discomfort in one or both arms, jaw, neck, back, or above the stomach.
• Shortness of breath without physical activity.
• Weakness, dizziness, lightheadedness, or sudden cold sweats.
• Nausea or vomiting.
• Fast or irregular heartbeat.

Tips For Safer Indulgence

• Enjoy indulgent foods, but balance your plate with healthy options. Aim for half your plate to be fruits and vegetables, a quarter protein, and a quarter starch, Kulkarni said. Start with a salad, then add whole foods like turkey with a modest portion of stuffing, beans, or sweet potatoes.
• Eat slowly. It can take up to 20 minutes for your brain to register fullness, so eating quickly can lead to overeating. Treat meals as a social event and savor the time with family and friends.
• Limit alcohol. Drinking can increase appetite and reduce self-control, leading to eating more.
• Stop when you feel full. Skip that second helping once you’ve had enough.
• Take a walk after meals. Walking can help reduce triglycerides, regulate blood pressure, and lower blood sugar, Kopecky said.

Large meals high in saturated fats, calories, and processed carbs can increase heart attack risk for people with underlying health conditions. But with moderation, adding healthy foods to your plate, and skipping extra servings, you can enjoy your meals while lowering your risk.

Bird flu viruses pose a particular danger to people because they can continue multiplying even at temperatures that would normally stop most infections. Fever is one of the body’s natural ways to slow viruses, yet new research from the universities of Cambridge and Glasgow shows that avian strains can survive what should be a hostile environment.

The study, published in Science, identifies a key gene that influences how well a virus copes with heat. This same gene moved into human flu strains during the 1957 and 1968 pandemics, allowing those viruses to spread more easily.

How Flu Viruses Thrive In The Body

Human influenza viruses infect millions each year. The seasonal strains we see most often fall under influenza A and tend to do well in the cooler temperatures of the upper respiratory tract, which is close to 33°C. They are less suited to the warmer, deeper parts of the lungs, where temperatures reach about 37°C.

As per Science Daily, when the body cannot slow an infection, the virus continues to multiply and spread, which can lead to more serious illness. Fever acts as a protective response, pushing body temperature as high as 41°C. Until now, the exact reason why fever slows some viruses but not others has been unclear.

Avian influenza behaves differently. These viruses usually grow in the lower respiratory tract, and in their natural hosts, such as ducks or seagulls, they often infect the gut. Temperatures in these areas can reach 40°C to 42°C, which helps explain their greater tolerance to heat.

How Fever Limits Infection and Why Bird Flu Can Resist It

If left unchecked, a virus can move through the body and cause significant harm. Fever is one of the body’s most familiar defence responses and can raise the core temperature to levels that inhibit many pathogens. Scientists have long known that some viruses withstand these temperatures, but the reason behind this resistance has remained uncertain.

Avian flu strains show a clear advantage in hotter environments. They thrive in the lower airways and, in birds, survive in the high heat of the gut. These features distinguish them from human influenza strains, which prefer cooler tissue.

Earlier studies in cell cultures hinted that avian flu copes better with fever-range temperatures than human strains. The new research offers direct evidence from animal experiments, helping explain why fever is effective against some types of influenza but far less useful against others.

Experiments Show Why Fever Slows Human Flu but Not Avian Flu

Researchers from Cambridge and Glasgow recreated fever-like conditions in mice to examine how different viruses responded. They worked with a lab-adapted human influenza strain known as PR8, which does not pose a threat to people.

Mice do not typically develop a fever from influenza A, so the scientists raised the temperature of the environment to lift the animals’ body temperature.

The findings were striking. When body temperature rose to fever levels, the human-origin virus struggled to replicate, and the infection weakened. Avian influenza behaved very differently. Raising the temperature did not stop the virus from multiplying, and a small increase of only 2°C was enough to turn a normally severe human-origin infection into a mild one.

The PB1 Gene Helps Bird Flu Withstand Fever

The study also identified the PB1 gene as a major reason why bird flu can tolerate heat. PB1 helps the virus copy its genetic material inside infected cells. When viruses carried an avian-type PB1 gene, they were able to endure high temperatures and still cause severe disease in mice. This matters because avian and human flu viruses can exchange genes when they infect the same host, such as pigs.

Dr. Matt Turnbull, the study’s first author from the Medical Research Council Centre for Virus Research at the University of Glasgow, explained that this gene swapping remains a major concern for emerging influenza strains. He noted that similar exchanges occurred in 1957 and 1968, when human flu viruses replaced their PB1 gene with one from an avian strain. According to the researchers, this may help explain why those pandemics were so severe.

In moments where life seems to slip away, many people describe seeing a bright tunnel with a strong light shining at the end. The image feels almost otherworldly. Whether it happens during major surgeries, car crashes, or sudden accidents, people from different places and backgrounds share accounts that sound strikingly alike. Films, novels, and personal stories often mention this same vision during a near-death experience. While some link it to a glimpse of the afterlife, there may be a scientific explanation for why the mind creates this scene.

Is it a sign of something beyond the physical world, a reaction of the mind in distress, or part of how the brain behaves as it shuts down? Here is what researchers have learnt.

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Do You Really See A Tunnel Of Light When You Die?

Yes. Scientists agree that many people do report seeing a tunnel of light when death is close. Even though death is certain, much about it still feels unclear. For generations, people have tried to understand what takes place in those last moments. Only in recent years, as medical care has advanced, have researchers been able to look more closely at near-death experiences, also known as NDEs, which occur when someone comes dangerously close to dying.

One of the most repeated features of NDEs is the bright tunnel, a sight described by millions. It is not a quick trick of the mind. People often speak of it as deeply emotional and unforgettable. This leads to difficult questions. Does this vision suggest something beyond physical life, or is the brain responding to extreme stress in its final effort to survive?

Why Do You See A Tunnel Of Light During Near-Death Experiences?

When someone nears death, the body begins to change very quickly. Vital functions start to drop. The heart may slow, reducing the amount of oxygen that reaches the brain. Body temperature can fall, and breathing may become weak or uneven. Along with these physical changes, the brain also reacts in its own way.

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Tunnel Of Light During Death Experiences: What Scientists Found

A team at the University of Michigan studied what happens in the brain as a person dies. They examined four people who were removed from life support and found that two of them showed a strong surge of brain activity right before death.

The pattern of activity was similar to what occurs when a person is awake and using higher thought. These bursts were produced by gamma waves, which are linked to conscious processing. In one patient, the rise in gamma activity was nearly three hundred times higher than normal.

Jimo Borjigin of the University of Michigan suggested that this might show a form of hidden awareness that becomes active just before death.

Professor Borjigin explained that some people near death may recall seeing or hearing things or may feel as though they are watching their body from above, or even moving through space. She said her team may have identified the basic brain steps connected to this type of hidden consciousness.

She added that future research needs to involve people who survive such events, so their brain activity can be compared with their own descriptions of what they experienced.

Another study in the Journal of the Missouri State Medical Association also explores how consciousness may shape near-death experiences. The researchers note that there is still much to learn about how the brain creates awareness and how that awareness influences what people see or feel as they approach death.