Should we be defining sperm norms in an infertile or in a fertile population, when applying it to an infertile population?

Should we be defining sperm norms in an infertile or in a fertile population, when applying it to an infertile population? Minerva Ginecol. 2017 Feb;69(1):109-110 Authors: Dahan MH PMID: 28116889 [PubMed - in process]
Source: Minerva Ginecologica - Category: OBGYN Tags: Minerva Ginecol Source Type: research