The sperm DNA fragmentation test evaluates the integrity of genetic material in sperm cells. Sperm DNA fragmentation refers to breaks or damage in the genetic material of sperm. This damage can compromise the sperm’s ability to accurately and reliably transmit genetic information during fertilisation and embryonic development.
Fragmentation is a major cause of male infertility, as it reduces fertilization rates, affects embryo quality, and increases the risk of miscarriage.
Various factors can lead to sperm DNA fragmentation, with oxidative stress being one of the main causes. Oxidative stress occurs when there’s an imbalance between the production of reactive oxygen species (ROS) and the body’s ability to neutralise them with antioxidants.
This imbalance can damage sperm DNA and other cellular structures. Oxidative stress is often linked to lifestyle factors such as smoking or excessive alcohol consumption, as well as medical conditions like infections, inflammation, and chronic illnesses. Other significant factors include:
DIAGNOSIS
Our state-of-the-art laboratories use advanced technologies to maximise success rates. To detect sperm DNA fragmentation, we use two methods.
This technique induces chromatin decondensation, allowing the DNA to unpack. Sperm with intact DNA display large dispersion halos, while fragmented DNA results in smaller or absent halos.
Sperm are immobilised in an agarose gel on a slide. The cells are then lysed to release the DNA, which is subjected to electrophoresis.
Under a fluorescence microscope, fragmented DNA migrates, forming a pattern resembling a comet, hence the name of the test. This technique can detect two types of DNA fragmentation: single- and double-strand fragmentation.
The sperm DNA fragmentation test analyses the integrity of the genetic material of spermatozoa, an aspect that is not assessed in a conventional semen analysis. While the semen analysis evaluates general semen parameters such as concentration, motility, and morphology, the DNA fragmentation test makes it possible to detect DNA damage that may affect reproductive capacity even when semen analysis results are normal.
Assisted reproduction techniques can be particularly helpful in these cases by enabling the selection of the most suitable sperm, thereby significantly increasing the chances of treatment success:
FIND ANSWERS TO YOUR QUESTIONS
Yes, it is possible to improve semen quality and reduce sperm DNA fragmentation through lifestyle changes and healthier habits. The aim is to reduce some of the factors that can contribute to sperm DNA damage, particularly oxidative stress.
However, the extent of improvement will depend on the cause of the fragmentation and each patient's individual circumstances. For this reason, when sperm DNA fragmentation is high, a medical assessment is important to identify possible contributing factors and determine whether other measures or treatments may be needed in addition to lifestyle changes.
Although sperm DNA fragmentation can reduce fertilisation rates and increase miscarriage risk, proper treatment and lifestyle changes can help many couples conceive.
Regular evaluations are essential to monitor sperm quality and adjust treatments as needed. In some cases, genetic counselling may also be beneficial. At IVF-Life, we offer specialised consultations to assess each case and determine the best treatment options.
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