Table 2.

Fertile, Indeterminate, and Subfertile Ranges for Semen Analysis Parameters as Identified by Regression Analysis

	Semen Measurement
	Concentration	Motility	Morphology
Variable	(× 106/mL)	(%)	(% Normal)
Fertile range	> 48.0	> 63	> 12
Indeterminate range	13.5–48.0	32–63	9–12
Univariate odds ratio	1.5 (1.2–1.8)	1.7 (1.5–2.2)	1.8 (1.4–2.4)
for infertility (95% CI)
Subfertile range	< 13.5	< 32	< 9
Univariate odds ratio	5.3 (3.3–8.3)	5.6 (3.5–8.3)	3.8 (3.0–5.0)
for infertility (95% CI)

95% CI, 95% confidence interval.

Reprinted with permission from Guzick DS et al. N Engl J Med. 2001;345:1388–1393. Copyright © 2001 Massachusetts Medical Society. All rights reserved.