Table 1.

Average semen quality (mean ± SD) and WHO classification (centile category for time-to-pregnancy) of the sperm samples selected for the proteomic study

	Average [conc]	Average normal forms (%)	Average motility (%)	WHO centile [conc]	WHO centile [morph]	WHO centile [mot]
Fertile donors	239.1 ± 81.6a	36.2 ± 9.8a	71.2 ± 11a	75–90	75–90	50–75
Infertile donors	24.8 ± 14.1b	5.6 ± 1.5b	44.5 ± 7.1b	10	10	10–25

^aTypical semen analysis of men able to conceive within one year as defined by Guzick et al.⁵.

^bTypical semen analysis of men unable to conceive within one year as defined by Guzick et al.⁵.