CA 125 Blood


A blood test for cancer antigen 125 (CA 125), a tumour marker which can indicate ovarian cancer.

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check_circle1 test included
schedule1 day turnaround   info
invert_colors Blood - finger-prick or venous    info

CA 125 (CA125)

About this test

There is no national screening test for ovarian cancer, although studies are currently being carried out on ultrasound and blood tests to see how good they are at detecting cancer early. This marker is raised in many cases of ovarian cancer and in some cases of endometrial cancer. It can also be raised in other conditions which are not cancerous, so care is needed in evaluating a positive result.

A very high level could be indicative of cancer whereas a moderately raised result can be caused by many sources of inflammation in the pelvic region such as pregnancy, menstruation, pelvic inflammatory disease and endometriosis. 

CA 125 can be raised in ovarian cancer, cancer of the womb (endometrium) and some other cancers (including pancreatic, stomach, colon, rectal and breast cancer).

In women who have a strong family history of ovarian or breast cancer, this test can be used regularly to try and help detect cancers in their earliest stages.

CA 125 is mostly used for monitoring purposes during treatment for ovarian cancer and to detect whether cancer has come back after treatment is complete. This check is also useful to test and monitor high-risk women who have a family history of ovarian cancer but who do not yet present any symptoms.

How it works

Collect Sample

We send you an easy-to-use kit to collect your blood sample.

Post Sample

Post your sample to our lab in the prepaid envelope provided.

View Results

View results securely in your own personal dashboard.

Important Information

This test contains a tumour marker test. Please see your doctor if you are suffering any unusual symptoms which persist - do not use these tests to self-diagnose. Tumour markers are most useful when viewed in conjunction with a clinical examination. Results do not constitute a diagnosis of cancer and markers are often tested to monitor treatment when cancer has already been diagnosed, or to check that it has not returned. Cancer markers can be elevated in benign conditions and results often produce false positives. Sometimes tumour markers can be normal even though cancer is present. Please make sure that you think carefully about the risks and benefits before taking this test.

Our tests are not a substitute for seeing your doctor, especially if you are suffering symptoms. Our doctors will interpret your results based on the information you have provided, but will not diagnose, consult or provide any treatment. You will be advised to see your doctor for any necessary follow-up action.

Tests Included

Tumour Markers

Cancer Antigen 125 (CA125) is a protein which is produced by cancer cells and which can be raised in cancers of the ovary, lung, breast, pancreas and gastrointestinal tract. 

As CA125 is also produced by normal cells it is important to know your base level and monitor regularly so that any change can be picked up early. 

A raised level is not necessarily a sign of cancer, just as a low level does not guarantee that cancer is not present. Elevated CA125 can be caused by anything that causes inflammation in the pelvic region including menstruation, endometriosis, pregnancy and pelvic inflammatory disease. However, we recommend that all raised levels are investigated further. 

Finger-prick blood sample collection kit

We will send you your CA 125 (CA125) finger-prick blood test sample collection kit which contains everything you need to take your blood sample in the comfort of your own home. If you are unsure about completing a finger-prick blood sample collection you will have the opportunity to select a clinic-based venous blood sample option during the checkout process.

How to collect a finger-prick blood sample

Postage & packaging

Your CA 125 (CA125) test includes 1st class postage and packaging for you to send your blood sample directly to our laboratory for analysis. If you live in an area where you cannot rely on the post or you simply want to ensure that your sample arrives at the laboratory the following day, you may wish to send your blood sample guaranteed next day delivery for extra reassurance.

Private laboratory analysis

Your blood sample will be analysed at one of our chosen laboratories. You can be assured of fast, accurate results from one of our accredited independent providers of clinical diagnostic tests.

Interpretation of results

Our medical team will comment on out-of-range blood test results and give you follow-up advice where necessary. If you need it, a PDF copy of your CA 125 (CA125) test results can be downloaded for your doctor.

Secure online account with

Once you have placed your order you will receive login details to where you can manage your account, track your orders and view your CA 125 (CA125) test results.

Health and Lifestyle tracker

Stay motivated by filling in your online health and lifestyle questionnaire and seeing how improvements in your lifestyle can influence your test results. Your medical and family history gives us vital information when interpreting your results.

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