Table 1.
Means (±SE) of the sperm parameters, and the principal components analysis of their variation.
Figure 1.
Contour plot showing the correlations between voice pitch, rated masculinity and attractiveness (colour "heat" corresponds to increasing voice pitch, which ranged from 85.3–134.2 Hz, blue being low pitch and red being high pitch).
Figure 2.
Scatterplot showing the association between voice attractiveness and sperm concentration (controlling for time since last ejaculation and frequency of sexual activity; red line shows the best least squares fit to the data).
Table 2.
Pearson correlations between voice parameters and semen quality.