Table 5. Factor loadings of the four sperm quality traits obtained by means of a principal component analysis.

	Factor loadings
Sperm quality traits	Factor score 1	Factor score 2
% normal sperm	0.899	0.069
% acrosome integrity	0.892	−0.192
% live sperm	−0.169	0.938
% motile sperm	0.626	0.680
eigenvalue	2.062	1.348
variance explained (%)	51.5	33.7

Factors were rotated by Varimax rotation method.