<prompt> Semen examination of a man showed counts of 25 millioncu.mm, volume - 1.5 ml; motility - 15; Morphology - 15. What is the diagnosis?AzoospermiaAsthenospermiaOligospermiaTeratospermia  <response>: World Health Organization reference values: Semen volume: 1.5 ml or more pH: 7.2-7.8 Sperm concentration: 15 million spermatozoa per ml or more Total sperm number: 39 million spermatozoa per ejaculate or more Range 36-42 million ml Total motility : 40 or more motile or 32 or more with progressive motility Round cells: 1 million mL Vitality: 58 or more live spermatozoa Sperm morphology Strict criteria: 4 or more of normal forms Asthenospermia : Reduced sperm motility. Azoospermia : Semen with no sperm. Oligospermia: low concentration of sperm Teratospermia :Sperm with abnormal morphology. 