Ovarian Cancer: What the New NICE Guidelines Mean for You and Why Symptoms Should Never Be Ignored

Ovarian cancer is often called a “silent killer” — but that reputation is not entirely accurate. The symptoms are there; the problem is that they are vague, common, and too easily attributed to other causes. With important updates to the NICE referral guidelines expected in March 2026, including new age-adjusted CA125 thresholds, now is the time for every woman to understand what to look for and when to seek help.

Why is ovarian cancer so difficult to catch early?

Ovarian cancer is the fifth most common cancer affecting women in the United Kingdom, with around 7,500 new cases diagnosed each year. Unlike cervical and breast cancer, there is no reliable national screening programme. The symptoms overlap with everyday complaints — bloating, feeling full, needing the toilet more often — which means they are frequently dismissed as irritable bowel syndrome, stress, or simply getting older.

The result is that the majority of ovarian cancers are diagnosed at an advanced stage, when treatment is more complex and outcomes are less favourable. Yet when caught early, the picture is dramatically different.

The symptoms every woman should know

The key word is persistent. Occasional bloating after a large meal is normal. Symptoms that occur on most days for three weeks or more are not. Watch for:

• Persistent bloating — not the kind that comes and goes, but a constant feeling of abdominal distension
• Feeling full quickly or a noticeable loss of appetite
• Pelvic or abdominal pain that is new, unexplained, and does not settle
• Urinary urgency or frequency — needing to go more often or more suddenly than usual
• Changes in bowel habit that cannot be explained by diet or other factors
• Unexplained weight loss or fatigue

Any one of these symptoms in isolation is unlikely to indicate ovarian cancer. But a combination of persistent changes, especially in a woman over 50, should always be investigated.

What are the new NICE guidelines changing?

Historically, the CA125 blood test has used a single cut-off of 35 U/mL for all women. The problem is that CA125 can be elevated for many benign reasons in younger women — endometriosis, fibroids, even menstruation — while remaining misleadingly within the “normal” range in some older women with early-stage cancer.

The updated NICE guidance proposes age-adjusted CA125 thresholds, which aim to reduce both false positives in younger women and missed diagnoses in older women. This is a significant step forward in making the referral pathway more accurate and more equitable.

The two-week wait pathway remains the gold standard for urgent assessment: if your GP suspects ovarian cancer based on symptoms, examination, and blood tests, you should be referred to a specialist within two weeks.

When to push for investigation

If you are experiencing persistent symptoms, do not wait for them to resolve on their own. Here is what you can do:

1. Track your symptoms — note the duration, frequency, and severity of any changes. A symptom diary can be a powerful tool when speaking to your doctor
2. Be specific with your GP — describe your symptoms clearly and explain how long they have been present. Avoid minimising what you are experiencing
3. Ask for a CA125 blood test and pelvic ultrasound if symptoms persist for three weeks or more
4. Request a referral to a gynaecologist if initial results are inconclusive but your symptoms continue
5. Seek a second opinion if you feel your concerns are not being taken seriously