Trauma Explanation Injuries to the testicles can damage the sperm making machinery. Symptoms Sports injuries and torsion cause obvious pain. Swelling may be noted. Some injuries will require surgical treatment. Torsion is corrected with the help of a urologist who unwinds the testicle which restores normal blood flow.
Some defects are congenital, or present at birth.
Klinefelter's Syndrome is a chromosome abnormality where there is an extra X chromosome. This syndrome prevents sperm production. Sertoli's Cell Only Syndrome results in an inability to produce sperm because the cells responsible for sperm production don't develop during fetal development. Undescended Testicles is another cause for sperm production failure. Testicles develop in the abdomen of the fetus and then descend into the scrotum after birth.