الفهرس 
Subjects and MethodsOnly 14 pages are availabe for public view
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Abstract
Considering all the couples willing and trying to conceive, the incidence of infertility is 15% of which approximately half of the cases are due to the male factors .Multiple factors including hormonal or genetic disorders, previous infections, previous genital, gonadal, or retroperitoneal surgeries, autoimmune factors, systemic diseases, heavy metals intoxication, smoking, gonado toxic agents, radiation, side effects of drugs, and postponing or smoothness materials play a role in male infertility.
However, varicocele is the most common finding
amongst males with primary infertility and fortunately, it is a treatable disease. Despite performing all necessary investigations, in more than 25% of all cases with male infertility the underlying etiology could not be
found . During the last 15 years, the overproduction of free radicals or reactive oxygen species (ROS) has been studied largely as a cause of sperm destruction and it has been concluded as a mechanism of infertility. Some of the ROS examples in seminal plasma was Coenzyme Q10.