Why is my left breast bigger than the right

Why is my left breast bigger than the right
In BLONDES I mention that, for many women, the left breast is slightly — about 4 percent — larger than the right. The factoid was buried in a discussion about sexual selection, the upshot of which is that breasts are a factor even in cultures that don’t eroticize the chest any more than the face. Breast symmetry is one cue of developmental stability, and large and symmetrical breasts suggest “good genes.” That said, yes, it’s normal to have one breast that is slightly larger than the other. The larger your breasts, the more obvious the asymmetry. For about 65 percent of us, the more voluminous one is the left.

But why?

Breast asymmetry is associated with rapid growth spurts prior to and during puberty. It’s normal for one breast to respond more to surging estrogen levels. Hormonal disruptions and other development problems accentuate the asymmetry. But why the left? No one knows for sure, but there are interesting theories:

* The immune system is known to be functionally asymmetrical, and immune hypersensitivity is higher on the left side of the body. It’s possible that enhanced immunosensitivity has an effect on tissue-plumping growth hormones such as estrogen. The immune system may send to the brain information that is asymmetrically expressed. Immune system asymmetry may also explain why cancers occur 5-10 percent more often in the left breast and inflammation associated with herpes zoster affects the left side more than the right.

* Nursing infants may make the left breast even larger. Although studies have not found a link between a larger left breast and handedness, many women report that they prefer having their dominant right hand free while breastfeeding, which means infants more often nurse on the left breast. Favoring the left breast makes it larger.

Personally, I prefer the explanation my friend gave her curious eight-year-old daughter when she saw that Mom’s left boob was bigger: It’s because I have a really big heart under it.

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Why is my left breast bigger than the right

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Why is my left breast bigger than the right

Why is my left breast bigger than the right

Bursts of brief, intense exercise over the course of the day — known as “sprint exercise snacks” — can improve cardiorespiratory fitness in inactive young adults.

Canadian Society for Exercise Physiology

Canadian Society for Exercise Physiology

Apr 12 2022

Why is my left breast bigger than the right

Targeting how and why older adults with complex medical issues take vitamin and mineral supplements can prevent unwanted side effects.

Canadian Society for Exercise Physiology

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Why is my left breast bigger than the right

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Why is my left breast bigger than the right

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Canadian Society for Exercise Physiology

Canadian Society for Exercise Physiology

Apr 11 2022

Why is my left breast bigger than the right

If your unequal breast size has been troubling you, it's time you read this to know the possible causes behind it.

Vanshika Sharma

Have you ever looked into the mirror and felt concerned about why one of your breasts is bigger than the other? If yes, you’ve landed at the right place. Breast asymmetry is when one breast differs from the other in terms of size, volume, position or form. And it’s common. A woman’s breasts may fluctuate in size or volume for a variety of reasons including trauma, puberty and hormonal changes. Come let us find out more about unequal breast size.

Dr Tanaya Narendra, popular on social media as Dr Cuterus, gave her Instagram followers a sneak peek into the subject of breast size, which not many women up about.

The expert says that the phenomena is common. For most people, it’s the left breast which is bigger. But if your right breast is bigger, there’s nothing abnormal about it. This difference can be as large as one cup size and there’s nothing to be worried about.

Also read: Adopt these 6 habits for healthy boobs

Why is my left breast bigger than the right
Don’t overthink your breast asymmetry. Image courtesy: Shutterstock

Some likely causes of unequal breast size are:

1. Normal differences in growth

Most of our body parts are not perfectly symmetrical. This may include our legs, hair and eyebrows. So, the reason for your unequal breasts may be due to typical physiological variances which are beyond one’s control.

During each phase of your menstrual cycle, your breast tissue keeps changing. For instance, when you are ovulating, they could seem bigger and more sensitive. When menstruating, they contract.

3. Change in hormones

Even if both the breasts finish developing at the same time, it is quite possible that one breast may begin to develop before the other when hormones shift during puberty. So, it can be due to hormonal changes.

4. Traumatic injury

Breast asymmetry can result from injury to breast tissue before it has fully matured, possibly between the ages of 10 and 11 when adolescent girls go through the phase of puberty. Asymmetric breast growth may result from traumas to the chest such as some big injury, trauma, infection, or radiation.

One breast grows noticeably bigger than the other in a condition called juvenile or virginal hypertrophy of the breast, which is not that common. This medical problem frequently results in physical and psychological issues and is treated by a surgery.

According to Dr Narendra, a sudden change in the size of your breasts should raise an alarm, and you must visit a doctor in that case.

Check out her full video here!

Is breast asymmetry a symptom of breast cancer?

Breasts that are uneven are typically nothing to worry about. Regular scans are necessary to ensure that any breast abnormalities are found early, though. However, if the density of your breasts suddenly changes or if the asymmetry of your breasts varies very frequently, this could be a sign of breast cancer.

According to a 2015 research, women who have a breast asymmetry ratio of over 20 percent may be more likely to get breast cancer.