Sperm DNA Fragmentation Test
Fertility concerns can be complex. In many cases, standard sperm analysis alone does not tell the full story. While a semen analysis measures sperm count, shape and movement, it does not assess the quality of the genetic material inside each sperm cell. The sperm DNA fragmentation test provides a more detailed picture of sperm health by identifying DNA damage that may affect fertility, embryo development and pregnancy success
We offer advanced sperm DNA fragmentation testing at The Forbury Clinic, performed in partnership with male fertility diagnostic specialists Examen. The Exact® Total Sperm DNA Fragmentation (SDF) Test provides a highly accurate measure of sperm DNA integrity, giving you and your fertility specialist valuable insight into potential causes of infertility, recurrent miscarriage or repeated IVF failure.
What is a Sperm DNA Fragmentation Test?
A sperm DNA fragmentation test analyses the genetic material inside sperm cells to detect levels of DNA damage, also known as fragmentation. High levels of DNA fragmentation can reduce the likelihood of successful fertilisation, healthy embryo development and full‑term pregnancy.
While many sperm cells contain some degree of fragmentation, extensive damage may be linked to factors such as oxidative stress, infection, smoking, age, heat exposure or lifestyle. Identifying this damage allows fertility specialists to tailor treatment more effectively; through lifestyle changes, medical therapy or assisted reproductive techniques such as IVF or ICSI.
How the Test Works
The Exact® Total Sperm DNA Fragmentation (SDF) Test uses Examen’s highly sensitive SpermComet® method, a scientifically validated laboratory technique recognised internationally for its accuracy in measuring DNA damage at a single‑cell level.
In this process, sperm DNA is gently unwound to reveal any strand breaks. Unlike other tests that estimate potential vulnerability to DNA damage, the SpermComet® assay provides a direct measurement of the fragmentation itself – offering the most precise reflection of overall sperm DNA quality.
Why Consider a Sperm DNA Fragmentation Test?
This test can be particularly valuable for men and couples who:
Have experienced unexplained infertility after normal semen results
Have a history of recurrent miscarriage despite normal fertility investigations
Have had unsuccessful IVF or ICSI cycles
Wish to evaluate sperm quality before beginning assisted fertility treatment
A clear understanding of sperm DNA health allows fertility specialists to refine treatment approaches, improving the chances of successful conception and healthy pregnancy outcomes.
What to Expect During Your Appointment
Initial Consultation
Your appointment begins with a discussion about your medical history, lifestyle and any previous fertility testing. The urology specialist will explain how sperm DNA fragmentation differs from standard semen analysis and how your results may support the next steps in treatment planning.
Sample Collection and Laboratory Testing
A semen sample is required for analysis. This is processed by Examen’s ISO‑accredited laboratory, where the Exact® SDF test is performed using the SpermComet® method. Results are reviewed alongside your medical background to provide a full fertility profile.
Results and Follow‑Up
Once your results are available, your clinician will interpret them clearly, explaining what your sperm DNA fragmentation level means for fertility outcomes. Where high fragmentation is identified, targeted advice, treatment or referral to a fertility consultant will be offered.
Sperm DNA Fragmentation Test FAQs
- How is this test different from a standard semen analysis?
A semen analysis measures sperm count, movement and shape, but not the quality of the genetic material within each sperm. The SDF test assesses DNA integrity, giving deeper insights that standard testing may miss.
- What can cause high DNA fragmentation?
Oxidative stress from smoking, heat exposure, age, poor diet or illness can damage sperm DNA. Infection, inflammation or environmental toxins may also contribute.
- Can sperm DNA fragmentation be treated or improved?
In many cases, yes. Lifestyle factors such as stopping smoking, improving diet, reducing alcohol and maintaining a healthy weight can lower DNA damage. Antioxidant therapies or specific fertility treatments may also help.
- Who should consider a sperm DNA fragmentation test?
Men with unexplained infertility, poor embryo quality, recurrent pregnancy loss or multiple unsuccessful IVF attempts may benefit from testing. It can also be helpful before assisted fertility treatments.
Why Choose The Forbury Clinic?
The Forbury Clinic provides consultant‑led male urology and fertility services with a focus on accurate diagnosis, advanced technology and personalised care. Through our partnership with Examen, leaders in male fertility diagnostics, you’ll receive precise sperm DNA analysis interpreted by experienced clinicians who specialise in male reproductive health. Our goal is to provide clarity, reassurance and evidence‑based guidance at every stage of your fertility journey.