Some male infertility patients may have a low sperm count. A number of factors may cause this: certain enviromental factors, chronic illnesses, genetic factors. The semen analysis can sometimes vary from time to time and thus we would usually check more than one sample to confirm any abnormality.
No sperm seen on semen analysis - Azoospermia
Certain enviromental and genetic factors could cause this condition. A careful evaluation and examination would be performed to elucidate the cause.