Endometrial Biopsy

An endometrial biopsy is typically performed during a brief office visit. Most patients can return to their usual activities afterward, and there is generally very little preparation required.

Before Your Appointment:

• Eat and drink normally. You do not need to fast before an office endometrial biopsy.

• Consider taking pain medication beforehand. If you can safely take NSAIDs, ibuprofen or naproxen approximately 30–60 minutes before your appointment may help with cramping afterward. Follow the dosing instructions provided by your healthcare team.

• Pregnancy testing: We may ask you to provide a urine sample for a pregnancy test before your biopsy, even if you do not think you are pregnant. Please avoid emptying your bladder immediately before your appointment, in case a urine sample is needed.

• Review your medications. Please let us know if you take blood thinners, have a bleeding disorder, or have medication allergies. Do not stop any prescribed medications unless instructed to do so.

• Let us know about any signs of infection. If you are experiencing fever, unusual vaginal discharge, or significant pelvic pain, please contact our office before your appointment.

• Discuss any concerns about pain or anxiety. Additional options may be available to help make the procedure more comfortable.
  
  

Scheduling Considerations:

• An endometrial biopsy can often be performed at different points in the menstrual cycle, depending on the reason for the procedure.

• Light bleeding or spotting may not prevent the biopsy, but please contact our office if you are experiencing very heavy bleeding.

• If you have been prescribed medication for anxiety or stronger pain relief, you may need someone to drive you home.

• You are welcome to bring a trusted friend, partner, or family member to your appointment for additional comfort and reassurance. They may also stay with you during the procedure if you wish.

You generally do not need to arrange time away from work or other activities, although some patients prefer to allow themselves a little time to rest afterward.

An endometrial biopsy is usually performed in the office and takes only a few minutes. You will be awake during the procedure, and we will explain each step as we go.

Here's what you can expect:

1. Getting positioned: You will lie on the examination table with your feet in stirrups, similar to a routine pelvic examination.

2. Placing the speculum: A speculum is gently inserted into the vagina so that your cervix can be seen. The cervix is then cleaned with an antiseptic solution.

3. Preparing the cervix: In some cases, a small instrument called a tenaculum may be used to gently hold and stabilize the cervix. Occasionally, the cervix may need to be dilated slightly to allow the biopsy instrument to pass.

4. Collecting the tissue sample: A thin, flexible tube called a Pipelle is passed through the cervix into the uterus. Gentle suction is used to collect a small sample of the uterine lining (endometrium). The instrument may be moved back and forth or rotated to obtain an adequate sample.

5. Completing the procedure: The biopsy instrument and speculum are removed, and the tissue sample is sent to a pathology laboratory for examination.
   
   

What Will It Feel Like?

You may experience pressure or discomfort when the speculum or other instruments are placed. The most noticeable cramping typically occurs when the biopsy sample is collected. This can feel similar to strong menstrual cramps and may be intense for some patients.

The sampling portion generally lasts less than a minute, although additional passes may occasionally be needed to collect enough tissue. Cramping usually improves quickly once the procedure is completed. We can pause if you need a break, and additional pain-management options may be available. Please see our Comfort & Pain Control section for more information.

Most patients are able to sit up, get dressed, and leave the office shortly afterward. Mild cramping or spotting may continue for a short time after the procedure.

An endometrial biopsy is a brief office procedure, but your comfort matters. Most patients experience cramping during the biopsy, which can range from mild to intense. The most uncomfortable portion typically lasts only a short time, although some cramping may continue afterward.

Everyone experiences the procedure differently, and we can tailor pain and anxiety management based on your preferences, medical history, and prior experiences.

Options we may consider include:

• Over-the-counter pain medication, such as ibuprofen or naproxen, when appropriate. These may help with cramping during and after the procedure.

• Topical lidocaine applied to the cervix to help reduce discomfort associated with cervical manipulation.

• Anxiety medication, such as lorazepam (Ativan) or diazepam (Valium), when appropriate. You will need a driver if taking one of these medications.

• Prescription pain medication in select situations.

• Paracervical block, using local anesthetic injected around the cervix to help reduce procedural discomfort. This may be particularly helpful for patients who anticipate significant pain.

• Supportive measures, such as a heating pad, comfortable positioning, taking breaks, and talking you through each step.

• Nitrous oxide (coming soon) as another option for procedural pain and anxiety.

You don't need to figure out which options are right for you ahead of time. If you're worried about pain or anxiety with an endometrial biopsy, please let me know so we can make a plan together.

• Pain Control Options for EMB (White Coat Mama, video)

An endometrial biopsy is a commonly performed office procedure that provides important information about the health of the uterine lining. Although it is generally safe, there are some potential risks and limitations.

Benefits

• Identifies abnormal changes: Helps diagnose endometrial hyperplasia (overgrowth of the uterine lining), precancerous changes, or endometrial cancer.

• Evaluates abnormal bleeding: May help identify changes in the uterine lining that contribute to heavy, irregular, or postmenopausal bleeding.

• Minimally invasive: Usually performed in the office without general anesthesia or a hospital stay.

• Guides treatment decisions: Results can help determine whether additional testing, medication, or surgery may be recommended.
  
  

Risks & Possible Side Effects

• Cramping or discomfort: Menstrual-like cramping is common during the procedure and may briefly be intense. Mild cramping can continue afterward.

• Spotting or bleeding: Light vaginal bleeding or spotting for a few days is common.

• Infection: Infection involving the uterus or pelvis is uncommon.

• Uterine perforation: Rarely, the biopsy instrument may pass through the uterine wall, potentially causing injury.

• Inadequate tissue sample: Sometimes insufficient tissue is collected for a definitive diagnosis, particularly when the uterine lining is very thin. Additional testing or repeat sampling may be necessary.
  
  

Important Limitations

An endometrial biopsy collects a small sample of the uterine lining rather than examining the entire uterine cavity.  A normal biopsy result does not completely rule out every possible abnormality. Certain conditions, such as endometrial polyps or localized areas of abnormal tissue, may be missed. If bleeding persists despite a reassuring biopsy result, additional evaluation with pelvic ultrasound, saline infusion sonohysterography, or hysteroscopy may be recommended.

Your healthcare provider will help determine whether additional testing is needed based on your symptoms, ultrasound findings, and biopsy results.

Most patients recover quickly after an endometrial biopsy and can return to their usual activities the same day. Some mild discomfort and spotting are normal as your uterus recovers from the procedure.

Common Symptoms After Your Biopsy

• Cramping: Mild to moderate menstrual-like cramps are common immediately afterward and usually improve within a few hours. Some patients may experience intermittent cramping for the remainder of the day.

• Spotting or light bleeding: Light vaginal bleeding or brown discharge may occur for a few days after the procedure.

• Temporary lightheadedness: Some patients feel briefly dizzy, nauseated, or faint immediately after the biopsy. If this happens, we will allow you time to rest before leaving the office.
  
  

Activity & Recovery

• Return to normal activities: Most patients can return to work, exercise, and other daily activities whenever they feel comfortable.

• Pain relief: Ibuprofen, naproxen, or acetaminophen (Tylenol) may help with cramping, depending on your medical history. A heating pad may also provide relief.

• Vaginal bleeding: Use a menstrual pad or pantyliner as needed to manage spotting.

• Intercourse, tampons, and menstrual cups: We generally recommend avoiding vaginal intercourse and inserting anything into the vagina for approximately 24–48 hours after the procedure, or until bleeding has stopped, unless your healthcare provider gives you different instructions.

• Bathing: You may shower normally after your biopsy.

Follow-Up

Your tissue sample will be sent to a pathology laboratory for examination. Results are typically available within approximately 3-5 days, although timing may vary. We will review your results and let you know if any additional testing, treatment, or follow-up is recommended.

Most patients have minimal downtime after an endometrial biopsy. If you experience symptoms that seem more severe than expected or are not improving, please contact our office.

The tissue collected during your endometrial biopsy is sent to a pathology laboratory, where it is examined under a microscope. Results are typically available within 3-5 days, although timing may vary. Your results will help us determine whether the uterine lining appears normal or whether additional testing or treatment may be needed.

Common Biopsy Results

• Benign (normal) endometrium: No precancerous or cancerous changes are identified. The tissue may show normal changes related to your menstrual cycle or hormone levels, such as proliferative, secretory, or inactive endometrium.

• Endometrial polyp: Sometimes the biopsy identifies tissue suggestive of a polyp, which is a usually benign growth of the uterine lining. Additional evaluation or removal with hysteroscopy may be recommended.

• Endometrial hyperplasia without atypia: An overgrowth of the uterine lining without precancerous cellular changes. Treatment often involves progesterone-based medication and follow-up sampling to confirm improvement.

• Atypical endometrial hyperplasia / Endometrial intraepithelial neoplasia (EIN): Precancerous changes in the uterine lining that carry a significant risk of concurrent or future endometrial cancer. Additional evaluation and treatment are necessary, sometimes including hysterectomy.

• Endometrial cancer: Cancerous cells are identified in the uterine lining. If this occurs, we will discuss the findings with you and arrange appropriate evaluation and treatment, typically with a gynecologic oncology specialist.

• Insufficient tissue for diagnosis: Occasionally, the biopsy does not collect enough tissue for a definitive result. This is more common after menopause when the uterine lining is thin. Depending on your symptoms and ultrasound findings, additional testing may be recommended.
  
  

• Explaining Endometrial Biopsy Results (White Coat Mama, video)
  
  

What Happens Next?

Your follow-up plan depends on your biopsy results, symptoms, and any additional findings from your evaluation.

• Normal results: No additional treatment may be necessary, or we may discuss options to manage ongoing abnormal bleeding.

• Benign structural changes: Additional imaging or hysteroscopy may be recommended if a polyp or other abnormality is suspected.

• Hyperplasia or precancerous changes: Treatment and follow-up sampling will be recommended based on the specific diagnosis.

• Cancerous findings: We will coordinate additional evaluation and management with a Gynecologit Oncologist.
  
  

What If My Biopsy Is Normal but I'm Still Bleeding?

An endometrial biopsy collects only a small sample of tissue and may not detect abnormalities involving a limited area of the uterine lining, such as a polyp. Persistent or recurrent abnormal bleeding deserves further evaluation, even when your biopsy results are reassuring. Depending on your symptoms and previous testing, we may recommend additional imaging or hysteroscopy to evaluate the uterine cavity more thoroughly.

Please contact our office if you have questions about your results or if your bleeding continues or returns after your evaluation.