Endometrial biopsy | Diagnosis of uterine problems in Turkey

Endometrium: Definition and structure

The endometrium is the inner lining of the uterus, and it plays a central role in reproduction. It has two layers:

• The basal layer: composed of epithelial cells and connective tissue, it houses the uterine glands and serves as the basis for mucosal regeneration.
• The functional layer: develops during the menstrual cycle and plays an essential role in embryo implantation and the onset of menstruation.

This lining is tightly regulated by the hormones estrogen and progesterone, which control its thickness and blood supply. When something disrupts this balance, a hormonal imbalance, an infection, or abnormal cell growth. It often shows up as unusual bleeding or pain, which is exactly what an endometrial biopsy helps investigate.

What conditions can affect the endometrium?

An endometrial biopsy allows your gynecologist to analyze tissue samples from the uterine lining to identify the root cause of abnormal bleeding or pelvic symptoms.

Key conditions identified via endometrial biopsy:

• Endometrial hyperplasia: Abnormal thickening of the uterine lining, which can sometimes be a precursor to cancer if unmonitored.
• Endometrial Polyps: Small, usually benign growths attached to the inner uterine wall that can cause irregular bleeding.
• Endometrial cancer: Malignant growth within the lining (most commonly adenocarcinoma),predominantly affecting postmenopausal women.
• Endometritis: Inflammation or infection of the endometrial tissue, often leading to pelvic discomfort or abnormal discharge.
• Hormonal imbalances & anovulation: Irregular shedding of the lining caused by hormonal fluctuations, common during perimenopause.

Are you concerned about your gynecological health? Schedule an appointment with one of our partner specialists for an accurate diagnosis and personalized care.

What is an endometrial biopsy?

It is a minimally invasive diagnostic procedure in which a small sample of the uterine lining is removed and examined under a microscope. It is used to evaluate the structure of the endometrium, identify abnormal cells, and check for infection. In fertility treatment, it confirms that the lining is properly synchronized with the menstrual cycle and ready for embryo implantation.

There are two main sampling methods, depending on your situation:

• Office aspiration biopsy (Pipelle biopsy): a thin, flexible tube is inserted through the cervix to gently suction a small tissue sample. No incision is needed, and it's typically done during a regular gynecological exam, without general anesthesia.
• Hysteroscopy-guided biopsy: a thin camera (hysteroscope) is used to directly visualize the uterine cavity before taking the sample, recommended when a more targeted biopsy is needed, for example if polyps or localized abnormalities are suspected.

Once collected, the tissue sample undergoes:

• Histopathological examination: Evaluates cell architecture, screens for atypical changes, and verifies cycle synchronization.
• Microbial culture: Performed when chronic endometritis or pelvic infection is suspected to identify specific bacterial pathogens.

When is an endometrial biopsy recommended?

An endometrial biopsy is indicated across several clinical scenarios, ranging from urgent oncological rule-outs to routine reproductive evaluations:

• Postmenopausal bleeding: Any uterine bleeding following menopause requires immediate investigation. While most cases stem from benign endometrial atrophy, postmenopausal bleeding remains the primary early warning sign of endometrial cancer and must never be ignored.
• Abnormal uterine bleeding (AUB) in reproductive years: Heavy, prolonged, frequent, or irregular bleeding outside the expected menstrual cycle, as well as intermenstrual spotting.
• Fertility assessment & assisted reproduction: Used to verify endometrial receptivity, confirm hormonal synchronization before IVF or artificial insemination, or investigate unexplained implantation failure.
• Hormone replacement therapy (HRT) monitoring: Evaluating the endometrial response in women undergoing long-term estrogen or combined hormone replacement therapy.
• Suspected structural or infectious pathology: Investigating persistent endometrial thickening seen on ultrasound, chronic endometritis, or focal lesions such as polyps and submucosal fibroids (often combined with hysteroscopy for targeted sampling).

How accurate is an endometrial biopsy?

Endometrial biopsy is a well-established, reliable diagnostic tool. Multiple studies show it has a high sensitivity for detecting endometrial cancer, particularly in postmenopausal women, with specificity (its ability to correctly rule out disease) generally reported above 95%.

That said, no diagnostic test is perfect: an aspiration biopsy can occasionally miss small, localized abnormalities like polyps, since it doesn't visualize the entire uterine cavity directly. If your symptoms persist despite a normal biopsy result, or if a more targeted sample is needed, your gynecologist may recommend a hysteroscopy-guided biopsy for a more complete picture.

Alternatives and complementary diagnostic tools

While an office endometrial biopsy is often the initial diagnostic step, it is frequently combined with, or supplemented by, other gynecological investigations to ensure a complete evaluation:

• Transvaginal ultrasound (TVUS): A non-invasive imaging tool used to measure endometrial thickness (>4 mm in postmenopausal women usually warrants further investigation) and identify structural changes like fibroids or focal thickening.
• Hysteroscopy with targeted biopsy: Allows direct visual inspection of the uterine cavity using a miniature camera. This approach is preferred when polyps, focal hyperplasia, or submucosal lesions are suspected, enabling targeted tissue sampling rather than blind sampling.
• Dilation and curettage (D&C): A minor surgical procedure performed under sedation or light anesthesia to gently scrape tissue from the uterine lining. D&C is recommended when an office biopsy is inconclusive, technically unfeasible (e.g., due to cervical stenosis),or when heavy acute bleeding requires immediate therapeutic intervention.

What are the contraindications?

An endometrial biopsy is not recommended in certain situations:

• Pregnancy: the procedure could harm the pregnancy.
• Active acute gynecological infection: needs to be treated first.
• Significant uterine abnormalities: certain anatomical conditions may make the procedure riskier or less reliable.

Your gynecologist will review your medical history and, if needed, perform an ultrasound before confirming that a biopsy is the right next step for you.

What does the procedure involve, and does it hurt?

The biopsy itself takes about 10 minutes and is usually performed during a routine gynecological exam. Most patients describe the sensation as similar to menstrual cramps; local anesthesia can be offered for added comfort if needed.

Mild, temporary side effects are common and expected:

• Light vaginal bleeding or spotting for a day or two.
• Abdominal cramping, usually resolving within a few hours.

Less common risks:

When and how do I get my results?

A pathologist examines the tissue sample and prepares a detailed report describing the cells' shape, structure, and any abnormal features. Results are typically available within 7 to 15 days, depending on the complexity of the analysis and, for international patients, coordination with your care team back home.

If your results show an abnormality, Turquie Santé's team helps you understand what it means and coordinates next steps with your gynecologist, whether that's further testing, a treatment plan, or a follow-up consultation.

How long do I need to stay in Turkey for an endometrial biopsy?

For most patients, a single visit of 1 to 2 days is enough, the consultation and biopsy can often be done on the same day or over two consecutive days if additional tests (like an ultrasound) are needed first. Since results take up to two weeks, you do not need to remain in Turkey until they're ready: your report is prepared, translated if needed, and sent to you digitally, with a teleconsultation available to review the findings with your gynecologist.

If your biopsy is part of a broader fertility treatment plan or a more extensive diagnostic work-up, your medical coordinator will confirm a schedule tailored to your specific care plan.