A few men produce

 

 

 

 

 

antibodies
Antibodies are an important part of your immune system. They are proteins made by white blood cells (another part of your immune system). They help destroy bacteria and other agents that cause infections.

 

 

 

 

 

antibodies that destroy or damage their own sperm, usually as a result of damage to the testicles or infection.

 

 

 

 

 

Source:
Meniru GI.
Male factor problems.
In: Cambridge guide to infertility management and assisted reproduction. Cambridge University Press, Cambridge, UK; 2001.

 

 

 

 

 

¹ Doctors now think this is less important as a cause of infertility than they used to.

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