What Is a Uterine (Endometrial) Polyp? Can It Cause Infertility?

Short Answer

A uterine polyp is a small, mostly benign tissue growth arising from the lining of the uterus. Not every polyp causes infertility, but by altering the area where the embryo implants it can make it harder for some patients to conceive; for this reason, removal of polyps detected in women who want children is generally recommended.

Key Takeaways

• Uterine polyps are growths arising from the uterine lining, the vast majority of which are benign.
• The most common symptom is spotting or irregular bleeding between periods; some polyps cause no symptoms at all.
• Polyps and fibroids originate from different tissues: a polyp develops from the endometrium, a fibroid from the muscle layer of the uterus.
• Diagnosis is made with ultrasound, HSG or hysteroscopy; definitive diagnosis and treatment are done together with hysteroscopy.
• In women who want children, removal of the polyp is generally recommended even if it is small.
• Polyp removal is a minimally invasive procedure, usually performed as a day case.
• Polyps can recur, although rarely; for this reason, regular follow-up is recommended after the procedure.

Are Polyps Only Found in the Uterus?

No, polyp-like growths can also be seen in the cervix and, rarely, in structures associated with the ovaries. However, the term "uterine polyp" specifically describes growths of endometrial origin located inside the uterine cavity. Polyp-like growths in different locations may require different evaluation and treatment approaches.

What Is a Uterine Polyp?

A uterine polyp is a soft, small tissue projection, usually attached to the uterine wall by a stalk, formed as a result of overgrowth of the endometrial tissue lining the inner surface of the uterus. Its size can range from a few millimeters to a few centimeters; there may be one or more in the uterine cavity. The vast majority of polyps are benign, but because they can rarely contain precancerous changes or cancer, the removed tissue is examined pathologically.

Why Do Uterine Polyps Form?

Although the exact cause of polyp formation is not fully known, it is thought to be related to excessive sensitivity of the endometrial tissue to the hormone estrogen. For this reason, the frequency of polyps may increase during periods when estrogen levels are relatively high or during some hormone treatments. Their frequency also tends to increase with age, but they are also a common finding in women of reproductive age.

Do Polyps Cause Pain?

Uterine polyps are usually not painful; the main symptom is bleeding. However, a large polyp, especially if it hangs toward the cervix or the uterus is trying to expel this tissue, can cause mild cramp-like discomfort. If a polyp is accompanied by marked pain, whether there is another additional condition (such as an infection) is also evaluated separately.

What Are the Symptoms of a Uterine Polyp?

Spotting Between Periods

One of the most common symptoms is light bleeding or spotting that occurs between two periods.

Irregular or Prolonged Menstrual Bleeding

Menstrual bleeding lasting longer than normal, being heavier than expected or becoming irregular may be associated with a polyp.

Bleeding After Intercourse

Some patients may have light bleeding after sexual intercourse.

No Symptoms at All

A significant proportion of polyps cause no symptoms and are detected incidentally during a routine ultrasound examination.

Can a Uterine Polyp Cause Infertility?

Not every uterine polyp causes infertility; small polyps that do not significantly distort the uterine cavity may not prevent pregnancy in some women. However, a polyp can adversely affect fertility through several mechanisms.

It Can Alter the Embryo Implantation Area

A polyp occupying space in the uterine cavity can physically disrupt the endometrial surface suitable for the embryo to implant.

It Can Affect the Intrauterine Environment

Polyp tissue can create an environment that may adversely affect the embryo's implantation process by altering the biochemical and inflammatory balance of the intrauterine environment.

It Can Make the Passage of Sperm More Difficult

Large polyps or those located near the cervix can, rarely, also make it harder for sperm to pass into the uterine cavity.

How Does a Polyp Affect IVF Success?

In IVF treatment, the aim is for the uterine cavity to be healthy and unobstructed before embryo transfer. Because a polyp detected in the uterine cavity may reduce the implantation chance of the embryo to be transferred, removing it before starting treatment is widely recommended. This approach aims to make the most of the time and effort spent on treatment with the highest chance of success.

How Does Polyp Size Affect the Treatment Decision?

Even small polyps can be decisive in the decision to remove them, especially if there is a desire for children; size alone is not decisive. Larger polyps usually cause more pronounced bleeding complaints, and their removal becomes a clearer necessity. The decision is made by evaluating the size and location of the polyp, the complaints and the patient's pregnancy plans together.

What Does a Polyp Look Like on Ultrasound?

On ultrasound, a polyp is usually seen as a well-defined thickening in the uterine cavity that appears slightly brighter than the surrounding tissue. The blood supply of some polyps can be shown more clearly with a special ultrasound mode (Doppler); this helps distinguish the polyp from other possible causes (for example, just a thickened endometrial layer). When the ultrasound finding remains suspicious, a definitive diagnosis is made with hysteroscopy.

What Is the Difference Between a Polyp and a Fibroid?

These two growths are often confused, but they arise from different tissues. A polyp arises from the inner lining of the uterus; they are usually soft, small growths attached by a stalk. A fibroid, on the other hand, arises from the muscle layer of the uterus; these are firmer growths that can be of different sizes. Both can cause abnormal bleeding and in some cases infertility, but their treatment approaches and follow-up processes may differ. You can find detailed information about fibroids in our article what are uterine fibroids?.

Is a Cervical Polyp the Same as a Uterine Polyp?

No. Polyps seen in the cervix have a different location and can usually be seen directly during examination; unlike uterine polyps, they can often be removed with a simple procedure, even outside a hospital setting. A uterine polyp, however, is located inside the uterine cavity, so it can only be seen directly and removed with hysteroscopy.

How Is a Uterine Polyp Diagnosed?

Ultrasonography

Seeing a thickening or a distinct mass in the uterine cavity on a routine gynecological ultrasound may raise suspicion of a polyp.

HSG (Hysterosalpingography)

A filling defect in the uterine cavity on an HSG performed during an infertility investigation may suggest the presence of a polyp. You can find detailed information about HSG in our article what is an HSG?.

Hysteroscopy

A definitive diagnosis is made with hysteroscopy, in which the uterine cavity is viewed directly with a camera. The most important advantage of this procedure is that both the diagnosis can be made and the polyp can be removed in the same session.

How Is a Uterine Polyp Treated?

Can It Be Monitored?

In patients with very small, symptom-free polyps and no desire for children, monitoring some polyps at regular intervals may be an option. However, this decision should be evaluated according to the patient's age, complaints and pregnancy plans.

Is Medication an Option for Polyps?

Medication does not reliably shrink or eliminate polyps; for this reason, the preferred approach is surgical removal. In some cases, medication may be used to temporarily reduce bleeding, but this does not eliminate the polyp.

Hysteroscopic Polypectomy

In women who want children, patients with marked complaints or patients whose polyp is growing, the polyp is removed with hysteroscopy. The procedure is minimally invasive, usually performed under sedation and mostly completed as a day case.

Is There Pain After Polyp Removal?

Most patients have mild cramping and spotting after the procedure, which decreases within a few days. Severe pain is not expected; because the procedure is performed under sedation, no pain is felt during the procedure itself. The recovery process is usually quick, and most patients return to daily life within a few days.

Why Should Polyps Be Removed in Women Who Want Children?

Because even a small polyp can reduce the embryo's chance of implantation, removal of detected polyps before starting treatment is widely recommended, especially in patients for whom IVF treatment is planned or who are trying to conceive naturally. This approach aims to increase both the chance of natural pregnancy and the success rate of IVF treatment.

How Soon After Polyp Removal Can You Get Pregnant?

Although this period varies from person to person, most clinics recommend waiting one or a few menstrual cycles after polypectomy; this period allows the uterine lining to heal completely. In patients for whom IVF treatment is planned, the time to start treatment is determined according to the doctor's evaluation of the inner structure of the uterus.

How Is the Cancer Risk of a Polyp Evaluated in Postmenopausal Women?

In polyps detected after menopause, the possibility that the cells they contain are abnormal is considered relatively somewhat higher compared with women of reproductive age. For this reason, in patients who present with postmenopausal bleeding and are found to have a polyp, removal and pathological examination are generally recommended more decisively.

How Many Polyps Can There Be at Once, and Are All of Them Removed?

While some patients have a single polyp, others may have more than one polyp at the same time. All polyps seen during hysteroscopy are removed in the same session whenever possible; this ensures that the uterine cavity is completely cleared and reduces the need for re-evaluation.

Do Uterine Polyps Recur?

Polyps can recur, although rarely, especially if there is an underlying hormonal tendency. For this reason, regular gynecological check-ups and, when necessary, ultrasound follow-up are recommended after polypectomy.

What Kind of Procedure Is Polypectomy, and Is General Anesthesia Needed?

The procedure is performed by passing a thin camera and small surgical instruments through the cervix; no incision is needed in the abdominal area. Most centers prefer a short-acting sedation, and full general anesthesia is usually not needed. Although the duration of the procedure varies according to the number and size of the polyps, it is usually short, and the patient is discharged on the same day.

At Which Stage of IVF Treatment Is a Polyp Noticed?

A polyp may be noticed during the routine uterine evaluation before starting treatment, during the preparation stage before embryo transfer or in the evaluation done after a previous attempt has failed. Regardless of the stage at which it is detected, removing it before transfer is adopted as the general approach. Although this sometimes causes a small delay in the treatment schedule, it is a valuable step for preserving the chance of success.

How Is a Polyp Distinguished From Other Causes of Irregular Periods?

Irregular periods can result from many different causes, such as hormonal disorders, thyroid problems or PCOS. Among these causes, a polyp is a structural cause that can be seen directly with imaging methods. For this reason, in patients presenting with irregular bleeding, the underlying cause is clarified by using both hormonal evaluation and imaging methods such as ultrasound together.

What Is Done During Pregnancy in a Patient With a Polyp?

A small polyp that was not noticed before pregnancy and is detected incidentally during pregnancy often does not require direct intervention; it is monitored during pregnancy follow-up. In cases that cause bleeding or marked complaints, the treatment decision is made individually for the patient, taking into account the week of pregnancy and the characteristics of the polyp. Such decisions are always made under close follow-up by an obstetrician.

Is There a Way to Reduce the Risk of Polyps?

There is no method that definitively prevents polyp formation, because the underlying mechanism is not fully known. Regular gynecological check-ups provide an indirect benefit by enabling abnormal bleeding to be noticed early and polyps to be detected while they are small. In patients using hormone therapy, reviewing the treatment at regular intervals may also be helpful in this respect.

Are Polyps Related to Weight or Nutrition?

Because excess weight can indirectly contribute to greater estrogen production in the body, it may be associated with a slight increase in risk for polyp development. However, this does not mean that polyps are seen only in overweight women; they are also common in women of normal weight. Although weight management is beneficial for overall health, it is not a method that on its own prevents polyp formation.

Is It Necessary to Avoid Sexual Intercourse When a Polyp Is Detected?

A simple, small polyp does not prevent sexual intercourse; however, if there is a complaint of bleeding after intercourse, this should be reported to the clinic. In the period after the procedure, it is generally advised to avoid sexual intercourse for a few weeks, according to the clinic's recommendation, until the healing of the uterine lining is complete.

When Should You See a Doctor?

• Recurrent spotting or bleeding between periods
• Marked prolongation or heaviness of menstrual bleeding
• Recurrent bleeding after sexual intercourse
• No pregnancy after one year of trying (6 months if over 35) when you want to have children

In these situations, a gynecological evaluation is recommended.

Which Symptoms Are Normal After Polyp Surgery?

Mild cramping, spotting and mild lower back pain lasting a few days after the procedure are expected symptoms. These complaints can usually be managed easily with simple pain relievers and decrease markedly within a week. Fever, foul-smelling discharge or steadily increasing severe pain, however, are not part of the normal healing process and need to be evaluated.

Is a Polyp a Common Finding?

A uterine polyp is a finding encountered quite often in gynecological practice; it is frequently detected in evaluations of women presenting with abnormal bleeding in particular. Being common does not mean it is unimportant; it needs to be evaluated individually in each patient. Knowing how common it is can help patients feel less anxious when they receive this diagnosis.

Is There a Difference Between a Polyp Detected at a Young Age and One Detected at an Older Age?

Polyps detected in young women of reproductive age are mostly benign, and the primary concern is usually their effect on fertility. In polyps detected at an older age, especially after menopause, the evaluation is made a little more cautiously, because the possibility of abnormal cell changes is considered relatively higher in this age group. In both cases, definitive information is obtained through pathological examination.

Common Mistakes

"If there is a polyp, it definitely means cancer."

The vast majority of polyps are benign; still, the removed tissue is always sent for pathological examination.

"If I have no symptoms, there is no polyp."

A significant proportion of polyps cause no symptoms and are detected incidentally during a routine examination.

"A small polyp doesn't affect pregnancy at all."

Even a small polyp can affect the embryo's implantation area; in women who want children, evaluation is recommended regardless of size.

"A polyp and a fibroid are the same thing."

They arise from different tissues; a polyp develops from the inner lining, a fibroid from the muscle layer.

"Once a polyp is removed, it never comes back."

It can recur, although rarely; for this reason, follow-up after the procedure is important.

Assoc. Prof. Dr. Nurettin Türktekin's Assessment

A uterine polyp is a finding we encounter frequently in infertility investigations, but it is usually benign and relatively simple to treat. What I emphasize most to my patients is this: a polyp should not be considered unimportant just because it is small, and its removal should be evaluated especially if there is a desire for children, because even the smallest change in the uterine cavity can affect the embryo's implantation process. Because hysteroscopic polypectomy provides both diagnosis and treatment in the same session, it is both a reliable and a relatively comfortable process for my patients. After the procedure, we review the pathology result together and clarify the next step according to the pregnancy plan.

Is It Necessary to Get a Second Opinion When a Polyp Is Diagnosed?

For a small, single, low-suspicion polyp, a second opinion is usually not needed. However, if the polyp is large, its appearance is not typical or the patient is hesitant about the decision, getting a second specialist opinion is a reasonable approach and can help the patient trust the decision more comfortably. What matters is that the images and reports obtained can be taken to the second evaluation.

What Is the Mechanism by Which Polyps Cause Bleeding?

Polyp tissue may contain more fragile blood vessels than the normal endometrial tissue around it. These vessels can respond differently from normal tissue to the hormonal changes of the menstrual cycle, causing bleeding at unexpected times in the cycle. This mechanism explains why spotting between periods is such a common symptom of polyps.

When Is an Ultrasound Repeated After a Polyp Is Removed?

To evaluate healing after the procedure, a check-up ultrasound is usually recommended after the next menstrual cycle. This check is done to confirm that the uterine cavity is clear and to notice an early recurrence, if any. In patients who want children, this check also clarifies when treatment or pregnancy attempts can safely begin.

Conclusion

A uterine polyp is a mostly benign tissue growth of endometrial origin and may not always cause symptoms. Spotting or irregular bleeding between periods is the most common symptom. Because even small polyps can contribute to infertility by affecting the embryo's implantation process, removal of polyps detected in women who want children with hysteroscopy is generally recommended. The procedure can be performed with a minimally invasive method as a day case and has a positive effect on the chance of pregnancy in most patients.