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How do you get a diagnosis of endometriosis?

The average time to get a diagnosis is 7 years. This is because symptoms can vary between women, and symptoms can change over time. Also, period pain is often accepted as normal.

When you visit your doctor, they will ask about your symptoms and your family and medical history. They may also ask to do an internal examination. Depending on your situation, your doctor may recommend an ultrasound, laparoscopy (keyhole surgery) or magnetic resonance imaging (MRI).

Some women have asymptomatic endometriosis, which means they don’t experience common symptoms such as pelvic pain or infertility. In these cases, the condition may be found during an unrelated operation or procedure.

When endometriosis symptoms are acknowledged and treated, most women with the condition do well.

On this page, you’ll learn about how endometriosis is diagnosed and when to see your doctor.

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Ultrasound

The first step to diagnosing endometriosis is usually an ultrasound. Ultrasound uses sound waves to produce images of your body. Doctors with expert training can use ultrasound to make a ‘working diagnosis’ of endometriosis. A working diagnosis is a tentative diagnosis based on information available at the time.

Depending on the findings and your symptoms, you may or may not need surgery. Medicines may be offered based on ultrasound findings alone and this may be all you need to manage the condition. If the ultrasound is normal, your doctor may still suggest medicines to help relieve symptoms.

Laparoscopy

A laparoscopy is keyhole surgery (via the abdomen) performed under general anaesthetic. A laparoscopy can confirm the presence of endometrial tissue, which can be treated during the operation. This operation is usually performed when other treatment options haven’t worked, when a woman has difficulty falling pregnant or when an ultrasound suggests there is deep endometriosis and scar tissue. It’s important to minimise this type of surgery, so look for a specialist who has experience using different treatments to manage endometriosis.

Magnetic resonance imaging (MRI)

MRI is a technology used to take cross-sectional pictures of your body. MRI may help diagnose endometriosis if it’s reported by a radiologist with experience in diagnosing the condition. Using this technology to help diagnose endometriosis is still in the early stages. MRIs may be a good option for people who can’t access specialist ultrasound scans or want to avoid surgery.

Stages of endometriosis

The American Society for Reproductive Medicine has created a staging system for endometriosis. Endometriosis is classified as minimal, mild, moderate or severe (or stages 1 to 4). The stages are based on where the endometriosis is and how much endometriosis is seen during surgery.

  • Stage 1 – a few shallow endometriosis implants.
  • Stage 2 – more shallow endometriosis implants and maybe some adhesions (bands of scar tissue).
  • Stage 3 – as above but cysts on one or both ovaries.
  • Stage 4 – many endometriosis implants, cysts on ovaries and thick adhesions.

The above classifications are useful, but they don’t always reflect the severity of symptoms. For example, a woman with stage 1 endometriosis may have more pain than a woman with stage 4 endometriosis.

If you have difficulty getting pregnant, doctors can use the Endometriosis Fertility Index to help predict your chances of pregnancy following surgery.

Endometriosis in teenage years

It can take time to get a diagnosis of endometriosis when you’re a teenager. But with more awareness of the condition and its symptoms, doctors are identifying endometriosis earlier.

Symptoms such as pain before and during a period, pain between periods or pain related to the bowel or bladder are common in teenage years. And these symptoms may not be due to endometriosis.

If you have symptoms, your doctor may explore different treatment options, such as medicines, before recommending surgery. Medicines commonly used to reduce pain include anti-inflammatory drugs such as ibuprofen, mefenamic acid and naproxen.

Your doctor may also recommend hormonal treatments such as the Pill and progestogens to reduce period pain.

You may find that medicines improve symptoms. But if pain persists and you’ve seen a doctor 3 or more times over 6 months, your doctor is likely to recommend a laparoscopy. Your doctor will be able to confirm the diagnosis and treat the endometriosis during surgery.

Your doctor can refer you to a gynaecologist with specialist skills in treating endometriosis in teenagers.

When to see your doctor about endometriosis symptoms

Pain is a common symptom of endometriosis. But it’s not normal to have severe period pain. If you think you have endometriosis, see your doctor as soon as possible, as early diagnosis and treatment can reduce the severity of the condition.

You can use our Endometriosis symptom checklist to help you talk to your doctor about your experience. Your doctor may ask questions about:

  • your periods, for example, if your periods are regular and if you have heavy bleeding
  • period pain, for example, where you have pain, how long the pain lasts, if the pain stops you from doing normal activities and what medicines help to reduce the pain
  • different types of pain, for example, if you have pain during or after sex, when you go to the toilet or during ovulation
  • different types of symptoms, for example, if you have constipation, diarrhoea or bloating; lower back or leg pain; or fatigue
  • your family history, for example, if family members have had endometriosis
  • your fertility, for example, if you have tried to get pregnant.

You might also like to read our Seeing your doctor about persistent pelvic pain fact sheet.

This con­tent has been reviewed by a group of med­ical sub­ject mat­ter experts, in accor­dance with Jean Hailes pol­i­cy.

1
Nnoaham KE, Hummelshoj L, Webster P, et al. Impact of endometriosis on quality of life and work productivity: a multicenter study across ten countries. Fertil Steril. 2011;96(2):366-373.e8. doi:10.1016/j.fertnstert.2011.05.090
2
Endometriosis guideline. www.eshre.eu. https://www.eshre.eu/Guidelines-and-Legal/Guidelines/Endometriosis-guideline
3
Revised American Society for Reproductive Medicine classification of endometriosis: 1996. Fertil Steril. 1997;67(5):817-821. doi:10.1016/s0015-0282(97)81391-x
4
de Sanctis V, Matalliotakis M, Soliman AT, Elsefdy H, Di Maio S, Fiscina B. A focus on the distinctions and current evidence of endometriosis in adolescents. Best Pract Res Clin Obstet Gynaecol. 2018; 51:138-150. doi:10.1016/j.bpobgyn.2018.01.023
Last updated: 
10 April 2025
 | 
Last reviewed: 
31 March 2025

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