A single sperm contributes all the genetic material (DNA) required to make one half of an embryo. The other half of the genetic material comes from the female egg. If the DNA in the sperm is highly fragmented then the chances of a healthy pregnancy reduces. Oxidative stress is the commonest cause of sperm DNA fragmentation.
A change to lifestyle and dietary factors can improve a High DNA fragmentation index in a sperm sample. Factors such as elevated testicular temperature, drugs, alcohol, smoking and diet can all damage sperm DNA.