What it measures
- CA-125
Who it’s for
- Persistent bloating, feeling full quickly or pelvic pain
- A family history of ovarian cancer
- Monitoring a known ovarian condition
Symptoms not to ignore
Ovarian cancer symptoms are easy to dismiss: bloating that doesn’t come and go, feeling full quickly, pain in your tummy or pelvis, and needing to pass urine more often. If you have any of these often or persistently, especially if you’re over 50, see your GP. NHS guidance uses CA-125 as the first blood test in this situation.
Why a raised CA-125 isn’t a diagnosis
Many harmless conditions raise CA-125, including periods, endometriosis, fibroids, pelvic infection, pregnancy and liver disease. And not every ovarian cancer raises it, especially early on. A result of 35 U/mL or more is usually followed by a pelvic ultrasound scan.
How to prepare
- If you still have periods, avoid testing during your period, as it can raise CA-125.
- Drink a couple of glasses of water beforehand: it makes the sample quicker and easier to take.
- No fasting needed. Eat and drink as normal.
How it works at our Croydon clinic
Book online
Choose your test and a time that suits you. No GP referral needed.
A 15-minute visit
A trained clinician takes a small blood sample at 169 Shirley Road, Croydon. Tell us if you’re nervous.
Results in 1–3 days
A clear report showing each result against its reference range.
Next steps
Share your report with your GP, who can arrange NHS follow-up if anything needs it.
Questions
Is CA-125 a screening test?
No. It isn’t accurate enough to screen women without symptoms, so it’s best used when you have symptoms or a known condition being monitored.
Ovarian cancer runs in my family. What should I do?
Speak to your GP about a referral for genetic assessment, as BRCA testing may be more useful than CA-125. We also offer BRCA1 and BRCA2 genetic testing by enquiry.
How much is a CA-125 Test in Croydon?
£77.50 at our clinic at 169 Shirley Road, Croydon, including taking your blood sample and your report.
How quickly will I get my results?
Usually within 1 to 3 days, in a clear report showing each result against its reference range.