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The Forbury Clinic

Sperm DNA Fragmentation Testing, London

Sperm DNA fragmentation testing is a more detailed fertility test that looks at the genetic material carried by sperm. It can provide further information when a standard semen analysis has not explained why pregnancy is taking longer than expected.

The test may be particularly helpful in cases of unexplained infertility, recurrent miscarriage or unsuccessful IVF treatment.

  • Urology · Advanced test
    Assesses sperm DNA integrity
    Beyond standard semen analysis
    Useful in unexplained difficulties
    Consultant-interpreted

What is sperm DNA fragmentation testing?

A standard semen analysis measures the number of sperm, how well they move and their shape. It does not show whether the genetic material inside the sperm is intact.

Sperm DNA fragmentation testing measures the proportion of sperm with damaged or fragmented DNA. Higher levels of DNA fragmentation may affect the chance of conception and embryo development, including where a standard semen analysis appears within the expected range.

This test can therefore provide useful additional information when fertility difficulties have not been explained by initial tests.

There are several laboratory methods used to assess sperm DNA fragmentation. Your consultant will advise whether the test is appropriate and which method may be most suitable as part of your wider fertility assessment.

Looking inside the sperm

How it works

DNA fragmentation testing can add information that a standard semen analysis cannot provide.

Measures DNA integrity

The test assesses the proportion of sperm with damaged genetic material.

May explain unexplained difficulties

It can provide further insight when sperm count, movement and shape appear within the expected range but conception is not happening.

Helps guide next steps

Your result may help guide further investigation, lifestyle advice, treatment for an underlying cause or discussion of assisted conception.

Who sperm DNA fragmentation testing may suit

Sperm DNA fragmentation testing may be particularly useful for men whose partners have experienced, or who themselves have:

  • Unexplained infertility despite a normal semen analysis
  • Recurrent miscarriage
  • Repeated unsuccessful IVF or assisted conception
  • A wish to investigate fertility in more detail before another treatment cycle

What to expect

  1. Consultation and assessment
    Your consultant will discuss your fertility history, previous test results and circumstances to confirm whether sperm DNA fragmentation testing may be appropriate.
  2. The test
    A semen sample is analysed in a laboratory to assess the level of sperm DNA fragmentation.
  3. Interpretation and plan
    Your consultant will explain the result in the context of your wider fertility assessment and discuss whether any further investigation, treatment or practical next step may be helpful.

Why choose The Forbury Clinic for sperm DNA fragmentation testing in London?

Why The Forbury Clinic
1

Deeper insight into fertility

The test examines sperm DNA integrity, which cannot be assessed through standard semen analysis alone.

2

A useful test in unexplained cases

It may provide further information when initial fertility tests have not identified a clear contributing factor.

3

Helps inform care

The findings can support decisions about investigating possible causes, improving sperm health or considering fertility treatment.

4

Consultant-led assessment in London

Your consultant will recommend testing only where appropriate and explain what the result may mean for you.

From testing to targeted action

DNA fragmentation testing is rarely used in isolation. It forms part of a broader fertility assessment.

Not every couple requires this test. It is recommended when additional insight is likely to change management.

If fragmentation levels are elevated, possible steps may include addressing underlying conditions, optimising lifestyle factors or adjusting assisted reproductive strategies.

Frequently asked questions

How is this different from a semen analysis?

A semen analysis assesses sperm count, movement and shape. Sperm DNA fragmentation testing looks at the integrity of the genetic material within sperm, which is not measured by a standard semen analysis.

When is sperm DNA fragmentation testing useful?

It may be helpful in cases of unexplained infertility, recurrent miscarriage or repeated unsuccessful IVF treatment, especially when initial semen analysis results have not provided a clear explanation.

Can high sperm DNA fragmentation be improved?

In some cases, it may be possible to address contributing factors. This can depend on the cause and may include treatment for an underlying condition or changes to lifestyle factors. Your consultant will explain what may be relevant to you.

Which type of DNA fragmentation test will I have?

Several laboratory methods are available. Your consultant will recommend the most appropriate test based on your fertility history, previous results and the information needed.

Reviewed by Mr. Steve Foley
Mr. Foley is a Consultant Urological Surgeon with a focus on female urology and male incontinence.
Last reviewed: 14 Sep 2026.

Look deeper for fertility answers

Book an Appointment

If a standard semen analysis has not explained your fertility concerns, sperm DNA fragmentation testing may provide useful additional insight. Our consultant urologists can discuss whether it may be appropriate for you.

  • Appointment
    Book a consultation
  • Reception
    0118 920 7055
  • Location

    The Forbury Clinic London, 45 Queen Anne St, London, W1G 9J

Treatment suitability is determined following consultation with a specialist. Individual results and recommendations vary.
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