Q: What are the values of a fertile and infertile sperm count?

A: A study published in 2001 in The New England Journal of Medicine categorized the results of the sperm count into three groups: Fertile, Indeterminate, and Subfertile.
Fertile: Concentration more than 48.0 million per milliliter, greater than 63% motility, greater than 12% normal morphology.
Indeterminate: Concentration between 13.5 and 48.0 million per milliliter, 32-63% motility, 9-12% normal morphology.
Subfertile: Concentration less than 13.5 million per milliliter, less than 32% motility, less than 9% normal morphology. Guzick et al NEJM 2001;345:1388-93