The blunt trauma injury may cause different levels of testicular tissue and adnexal (surrounding) structures that are associated with male sterility through spermatogenesis disorders (affection sperm production), autoimmune mechanisms or by injury the ejaculatory ducts.
Getting a traumatic injury to testicles can result in a cause of low testosterone level. This may cause weaker and softer erections. Also, low testosterone may cause decrease in sperm amount, such as azoospermia, the condition of a man whose semen contains no sperm. As a result, men fertility may be impaired since men have weak erection or no sperm in semen to fertilize the egg.