What are the explanations for an abnormal sperm count?

Here is the Abnormal Sperm Glossary:

  • Aspermia: No semen volume
  • Asthenozoospermia:Sperm motility is <40%
  • Azoospermia: No sperms in the semen
  • Globozoospermia : Round headed sperm without acrosome
  • Hematospermia: Red blood cells present in semen
  • Hyperspermia: Semen volume >5.5 ml
  • Hypospermia: Semen volume <2 ml
  • Necrozoospermia:
    Nonviable ("dead") sperm
  • Oligoasthenozoospermia: Motile density is <8 million sperm/ml
  • Oligozoospermia: Sperm count less than 20 million/ml
  • Polyzoospermia: Excessively high sperm concentration
  • Pyospermia: Leukocytes (germ-fighting cells) present in semen
  • Teratozoospermia: > 40% of sperm seen are abnormally formed