Table 3.

Variance component estimation for sperm parameters sperm count, total motility, progressive motility and morphology of seven patients who did not receive a treatment with four repeated measurements in order to obtain unbiased estimates. The high variability is obvious

Parameter	n	Geometric mean	Inter‐individual variability† s‐interval		Intra‐individual variability† 2 s‐interval
			Lower border	Upper border	Lower border	Upper border
Sperm concentration (million/mL)	7	20.44	5.33	78.46	4.91	85.13
Total motility (%)	7	41.06	26.42	63.81	18.30	92.11
Progressive motility (%)	7	33.35	20.34	54.67	11.20	99.27
Morphology (%)	7	13.57	5.42	33.98	2.13	86.53

^† Computation of the variance components is based on the assumption of log‐normal distribution of the parameters of interest. The variability is characterized by the 2 s‐interval calculated around the total geometric mean computed for all 28 observed values.