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Blood tests for sexually transmitted infections

Professionally updated: January 30, 2026

Sexually transmitted infections can often progress without obvious symptoms, but can still have consequences for your health if they are not detected and treated in time. A blood test can provide clarity and peace of mind by detecting any infections that cannot always be detected by urine or swab tests alone.

This blood test is relevant for anyone who wants a thorough screening for sexually transmitted diseases, regardless of whether you have symptoms, have had unprotected sex, or simply want certainty.

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Jakob Fraes
Specialist in General Medicine, Ph.D.
Read more about sexually transmitted blood tests. Everything you need to know.

What is a blood test for sexually transmitted infections?

A blood test for sexually transmitted infections is a diagnostic test used to detect certain infections that are transmitted through sexual contact. The blood test analyzes your blood for antibodies or viral markers and can provide reliable insight into whether you have or have had a sexually transmitted infection.

Early detection is important, even if you do not experience any symptoms. Many sexually transmitted infections can progress without causing any discomfort, but can still affect your health or risk of infection. A blood test can therefore be a relevant part of an examination by a gynecologist if you want certainty, peace of mind, and the opportunity for timely treatment.

What does the blood test check for?

The blood test is designed to identify a range of sexually transmitted infections that can be detected either fully or partially via a blood test. The aim is to provide a broad and reliable overview of your sexual health.

Certain sexually transmitted diseases cannot always be reliably detected by urine tests or swabs alone, as they are either not located locally in the mucous membranes or can only be traced through changes in the blood. In such cases, blood tests serve as an important supplement and can contribute to a more comprehensive assessment.

The blood test includes tests for:

By testing for multiple infections at once, the risk of overlooking an underlying infection is reduced.

How does it work and what is the price?

To have the blood test done, you need to book a physical consultation with one of our doctors. During the consultation, the doctor will review your situation, advise you, and take the blood sample.

The blood test requires:

  • A physical consultation
  • 30 minutes consultation time

The price for the blood test is DKK 2,250 and will be added to the consultation fee. See our prices here.

The results will be reviewed with you afterwards, and you will receive clear information about any findings and further treatment, if necessary.

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Frequently asked questions about blood tests for sexually transmitted infections

Can I have the blood test without symptoms?

Yes. Many sexually transmitted infections can be asymptomatic, but can still affect your health or pose a risk of infection. A blood test may therefore be relevant, even if you do not experience any symptoms, to provide reassurance and clarity.

Is a blood test sufficient to rule out all sexually transmitted diseases?

The blood test covers a number of important infections, but not all sexually transmitted diseases can be detected through blood alone. Depending on your situation, your doctor may recommend additional tests, such as urine tests or swabs, to ensure a complete overview.

How long will it take to receive a response?

The results of the blood test are typically reviewed with you after a few days. The doctor will explain the results, advise you on any treatment, and discuss the next steps so that you feel both informed and reassured.

Can I make an appointment without a referral?

Yes. At Lægerne Danmark, you can book an appointment directly with our doctors without a referral. You will receive quick access to individual counseling, blood tests for sexually transmitted infections, and follow-up care tailored to your needs and health.