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Endometrial Biopsy: Why It Is Done, What to Expect and What Results Can Show

An endometrial biopsy is a short office procedure where a provider removes a small piece of tissue from the lining of the uterus, called the endometrium, and sends it to a lab for examination under a microscope. It’s most often used to find the cause of abnormal bleeding, such as heavy, prolonged, or irregular periods, bleeding after menopause, or bleeding while on hormone therapy. It can also be ordered when an ultrasound shows a thickened uterine lining, or as part of checking for endometrial cancer.

Seek Care Right Away for These Signs

In This Article

Some bleeding patterns need urgent attention rather than a routine appointment. If you are changing a pad or tampon every hour for more than two hours in a row, and you also have chest pain, shortness of breath, or feel lightheaded or dizzy, treat this as an emergency and get medical care right away, including calling 911 if symptoms are severe.

After a biopsy, contact your provider if you notice heavy bleeding that soaks through protection, fever, severe pelvic pain, or foul-smelling vaginal discharge. These are not expected after the procedure and should be checked promptly.

Common Reasons a Provider Might Recommend This Test

  • Abnormal menstrual periods, including heavy, prolonged, or irregular bleeding
  • Bleeding after menopause
  • Bleeding that starts or changes while on hormone therapy, including the breast cancer medicine tamoxifen
  • A thickened uterine lining found on ultrasound
  • Bleeding linked to changes in hormone levels when ovulation isn’t happening regularly
  • Evaluation for endometrial cancer or precancerous changes

A provider decides whether this test fits your specific situation based on your history, age, and other findings. This article explains the general process; it isn’t a recommendation that you personally need the test.

Questions Worth Asking Before Your Appointment

A little preparation can make the visit go more smoothly. Consider asking your provider:

  • Do I need to confirm I’m not pregnant before this test?
  • Should I take an over-the-counter pain reliever, like ibuprofen or acetaminophen, before I come in?
  • Will this be done with or without anesthesia, and what does that mean for my day afterward?
  • Are any of my current medications, including blood thinners such as warfarin, clopidogrel, or aspirin, something I should mention beforehand?
  • How and when will I get my results?

In general, it’s recommended to avoid vaginal creams or medicines in the two days before the test and to avoid douching altogether, since douching can raise the risk of infection. Your provider can tell you which of these apply to your situation.

What Happens During the Procedure

The steps below describe the general process. Your provider may adjust the order or details based on your situation.

  1. You lie on your back with your feet in stirrups, similar to a routine pelvic exam.
  2. Your provider inserts a speculum to view the cervix, then cleans the cervix with a special liquid. Numbing medicine may be applied.
  3. The cervix may be gently held steady with an instrument, and gently stretched if needed.
  4. A thin instrument is passed through the cervix into the uterus to collect a small tissue sample.
  5. The instruments are removed, and the tissue sample is sent to a lab for examination.
  6. If you received anesthesia, you’ll rest in a recovery area until you’re comfortable and cleared to go home.

What It Typically Feels Like

The instruments may feel cold, and you may notice cramping when the cervix is grasped and as the sample is collected. Discomfort is usually mild, though some women describe it as more intense. The test itself is brief, and any discomfort typically doesn’t last long after it’s done.

Recovery Checklist: What’s Expected vs. What to Report

Usually expected in the days after

  • Light spotting for a few days
  • Mild cramping for a day or two
  • Return to normal activity the same day, unless you were sedated
  • No special aftercare beyond routine hygiene

Report these to your provider

  • Heavy bleeding that soaks through protection
  • Severe or worsening pelvic pain
  • Fever or chills
  • Foul-smelling vaginal discharge

Who May Need Extra Caution or a Different Approach

This test is done only when you are not pregnant, which is why a pregnancy test is sometimes required beforehand. People taking blood thinners, or with a history of bleeding disorders, uterine perforation risk factors, or active pelvic infection, may need extra planning or a different evaluation approach. Your provider is the right person to sort out whether any of this applies to you.

Risks to Know About

  • Infection
  • Perforating the uterus or tearing the cervix (this is rare)
  • Prolonged bleeding
  • Slight spotting and mild cramping for a few days

What Results Can Show — In General Terms

A biopsy is considered normal when the cells in the sample don’t show abnormalities. Abnormal results can have a range of causes, including uterine fibroids, polyps, infection, hormone imbalance, or precancerous or cancerous changes in the endometrium. This article can’t tell you what your specific results mean or what happens next for you — that conversation belongs with the provider who ordered your test and can review your full history alongside the pathology report.

Limitations of This Guide

  • This guide describes the general procedure and does not interpret pathology results.
  • It doesn’t cover every possible variation in technique, anesthesia option, or provider preference.
  • Individual risk factors, medications, and health history can change what’s appropriate for you.
  • This is not a substitute for an individualized evaluation with a qualified clinician.

Frequently Asked Questions

Is an endometrial biopsy painful?

Most women feel some cramping during the procedure, and discomfort is usually mild, though it can be more noticeable for some. The test itself is brief. Ask your provider ahead of time whether taking a pain reliever beforehand makes sense for you.

How long does it take to get results?

Timing depends on the lab processing the sample and your provider’s office. This guide doesn’t set a specific timeline — ask your provider when you should expect to hear back and how they’ll share results with you.

Can I go back to work or normal activities the same day?

If you didn’t receive anesthesia, many people resume normal activities the same day. If you did receive anesthesia, plan for recovery time and arrange a ride home, since you may not be cleared to drive right away. Your provider can tell you what to expect for your specific procedure.

Does an endometrial biopsy replace an ultrasound?

They serve different purposes and are sometimes used together. This guide doesn’t cover how your provider decides which tests to combine — that decision depends on your symptoms, history, and what your provider is trying to rule out.

Educational Disclaimer

This article is for general educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. It does not interpret pathology results, and reading it does not create a provider-patient relationship. Reproductive Health Ctr is an independent educational publication and does not provide medical diagnosis or treatment. If you are having a medical emergency, call 911 or go to the nearest emergency room. Always talk with a licensed healthcare provider about your specific situation, including before starting, stopping, or changing any test, medication, or treatment plan.