Why Do Uterine Fibroids Happen in Women? Dr. Ajay Aggarwal Explains

Uterine fibroids are one of the most common conditions affecting women during their reproductive years. Many women discover they have fibroids during a routine ultrasound, while others seek medical advice because of heavy periods, pelvic pain, pressure, or difficulty becoming pregnant.

A common question women ask is: Why do uterine fibroids happen in the first place?

The exact cause of fibroids is not fully understood. However, research shows that several factors, including hormones, genetics, age, and other biological factors, may play a role in their development and growth.

According to Dr. Ajay Aggarwal, understanding why fibroids develop can help women recognize symptoms early and seek appropriate treatment when needed.

What Are Uterine Fibroids?

Uterine fibroids are non-cancerous growths that develop in or around the uterus. They are made up of muscle and fibrous tissue and can vary greatly in size. Some women may have a single fibroid, while others may develop multiple fibroids.

Fibroids can grow in different parts of the uterus. Based on their location, they are commonly classified as:

• Intramural fibroids: Develop within the muscular wall of the uterus.

• Submucosal fibroids: Grow toward the inner cavity of the uterus and may cause heavy menstrual bleeding.

• Subserosal fibroids: Grow toward the outer surface of the uterus and may cause pressure or discomfort.

• Pedunculated fibroids: Grow on a stalk attached to the uterus.

Not every fibroid causes symptoms. Some women may have fibroids for years without knowing they are present.

Why Do Uterine Fibroids Develop?

There is no single reason why a woman develops fibroids. Doctors believe that a combination of hormonal, genetic, and other factors may contribute to their formation.

1. Hormonal Changes

The hormones estrogen and progesterone play an important role in the growth of the uterine lining during the menstrual cycle. These hormones may also influence the growth of fibroids.

Fibroids are more common during the reproductive years, when these hormones are active. They may grow during pregnancy when hormone levels increase and often become smaller after menopause when hormone levels naturally decline.

This hormonal connection is one of the important reasons why fibroids are commonly seen in women between puberty and menopause.

2. Genetic Factors

Genetics may also influence the development of uterine fibroids. Women who have a close family member with fibroids may have a higher likelihood of developing them.

Researchers have also identified genetic changes within fibroid tissue. However, having a family history does not mean that a woman will definitely develop fibroids.

3. Age and Reproductive Stage

Fibroids are uncommon before puberty and are most frequently diagnosed during the reproductive years. The risk can increase with age until menopause.

As women move through different reproductive stages, changes in hormone levels and other biological processes can influence the development and growth of fibroids.

4. Pregnancy and Hormonal Environment

Pregnancy causes significant hormonal changes in the body. In some women who already have fibroids, these changes may cause the fibroids to grow temporarily.

However, pregnancy does not mean that a woman will necessarily develop fibroids. Many women with fibroids also have completely healthy pregnancies.

If a woman with fibroids is planning pregnancy, discussing the size and location of the fibroids with a gynaecologist can be helpful.

5. Other Biological and Lifestyle Factors

Researchers have studied several other factors that may be associated with fibroids, including body weight, diet, vitamin D levels, and certain metabolic factors. However, these factors do not provide a simple explanation for why one woman develops fibroids while another does not.

It is important not to blame yourself if you develop fibroids. In many cases, there is no single lifestyle choice or action that can be identified as the cause.

What Increases the Risk of Uterine Fibroids?

Some factors may increase the likelihood of developing fibroids. These can include:

• Family history of uterine fibroids

• Reproductive age

• Hormonal factors

• Certain genetic factors

• Increasing age before menopause

• Some metabolic and lifestyle factors

Having one or more risk factors does not necessarily mean that a woman will develop fibroids.

What Symptoms Can Fibroids Cause?

Many women with fibroids have no symptoms. When symptoms do occur, they can vary depending on the size, number, and location of the fibroids.

Common symptoms may include:

• Heavy or prolonged menstrual bleeding

• Painful periods

• Pelvic pain or pressure

• Lower abdominal discomfort

• Frequent urination

• Constipation or difficulty passing stool

• Pain during sexual intercourse

• Abdominal enlargement

• Back or leg pain in some cases

• Difficulty becoming pregnant in certain situations

Heavy menstrual bleeding can sometimes lead to iron-deficiency anaemia, which may cause tiredness, weakness, or shortness of breath.

Can Uterine Fibroids Affect Fertility?

Not every fibroid affects fertility. However, certain fibroids, particularly those that distort the uterine cavity, may interfere with conception or pregnancy in some women.

The impact depends on several factors, including the location, size, and number of fibroids, as well as the woman's overall reproductive health.

A woman who has fibroids and is experiencing difficulty conceiving should have an individual evaluation rather than assuming that fibroids are the only cause.

How Are Fibroids Diagnosed?

A gynaecologist may suspect fibroids based on symptoms and a pelvic examination. An ultrasound is commonly used to identify and assess fibroids.

Depending on the situation, a doctor may recommend additional tests to understand the exact location and characteristics of the fibroids.

The right evaluation helps determine whether treatment is necessary or whether monitoring is sufficient.

Do All Fibroids Need Treatment?

No. Treatment is not always necessary.

If fibroids are small and are not causing symptoms or complications, a doctor may recommend regular monitoring instead of immediate treatment.

Treatment may be considered when fibroids cause problems such as:

• Heavy menstrual bleeding

• Significant pain or pressure

• Anaemia

• Bladder or bowel pressure

• Fertility-related concerns

• Rapidly increasing symptoms

• A significant effect on quality of life

The appropriate treatment depends on the woman's age, symptoms, fibroid characteristics, fertility plans, and overall health.

What Treatment Options Are Available?

Treatment for fibroids can range from medication and observation to minimally invasive procedures or surgery.

Depending on the individual case, options may include medicines to control symptoms, procedures that target fibroids, myomectomy to remove fibroids while preserving the uterus, or other surgical approaches when medically appropriate.

There is no single treatment that is best for every woman. A personalised evaluation is important, especially for women who want to preserve their fertility.

When Should You See a Gynaecologist?

Women should consider consulting a gynaecologist if they experience unusually heavy periods, persistent pelvic pain, pressure, prolonged bleeding, unexplained abdominal enlargement, or problems related to fertility.

It is especially important to seek medical advice if heavy bleeding is affecting daily activities or causing symptoms such as extreme tiredness or weakness.

Early evaluation can help identify the cause of symptoms and provide appropriate treatment options.

Dr. Ajay Aggarwal's Advice for Women With Fibroids

Uterine fibroids are common and, in most cases, are benign growths rather than cancer. Finding a fibroid does not automatically mean that surgery is required.

The most important step is to understand the fibroid's size, location, number, symptoms, and possible effect on fertility. Treatment should be based on the individual woman's needs rather than simply the presence of a fibroid.

Women experiencing heavy bleeding, pelvic pressure, pain, or fertility concerns should consult an experienced gynaecologist for proper evaluation and guidance.

Frequently Asked Questions About Uterine Fibroids

What is the main cause of uterine fibroids?

There is no single known cause. Hormonal factors, genetic changes, age, and other biological factors are believed to contribute to fibroid development.

Can stress cause uterine fibroids?

Stress is not considered a direct, proven cause of uterine fibroids. However, overall health and hormonal factors can influence many aspects of reproductive health.

Can fibroids go away on their own?

Fibroids often shrink after menopause because estrogen and progesterone levels decrease. Before menopause, they may remain stable, grow, or sometimes shrink depending on individual circumstances.

Can fibroids become cancerous?

Uterine fibroids are benign growths and are not considered a form of cancer. A rapidly changing pelvic mass should always be evaluated by a doctor rather than assumed to be a fibroid.

Can women with fibroids become pregnant?

Yes. Many women with fibroids become pregnant and have healthy pregnancies. However, certain fibroids can affect fertility or pregnancy depending on their size and location.

Is surgery always needed for fibroids?

No. Many women with fibroids do not need surgery. Treatment depends on symptoms, fibroid characteristics, age, fertility plans, and overall health.

Final Thoughts

Uterine fibroids are common, but their exact cause can vary from woman to woman. Hormones, genetics, age, and other factors may all contribute to their development.

The presence of fibroids does not automatically mean that a woman needs treatment or surgery. What matters is understanding how the fibroids are affecting her health and whether they are causing symptoms or fertility concerns.

If you are experiencing heavy periods, pelvic pain, pressure, or fertility problems, a consultation with a qualified gynaecologist can help identify the underlying cause and guide you toward the right treatment.

Dr. Ajay Aggarwal provides comprehensive gynaecological care and evaluates fibroid-related concerns based on each woman's individual symptoms, reproductive goals, and medical needs.