8. Summary 
Spermatogenesis has been shown to be inhibited by a 
variety of ways. Reduced quanta of light, vitamin E deficiency, 
altered hormonal balance, spontaneous hybridization and sex-= 
feversal all appear to influence varying degrees of spermatoe 
genic inhibition. 
Inhibition of spermatogenesis has been induced by 
shortwave irradiation, drug treatment and as an immune response. 
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