"...The present paper reports dielectric properties of semen at microwave frequencies as well as the quantitative analysis in the clinical laboratory. It is observed that conductivity of semen depends upon the motility of sperm as well as the time elapses after ejaculation."
http://piers.org/piersonline/download.php?file=MDUwNTE3MTMxMDM5fFZvbDJObzFQYWdlMTEwdG8xMTQucGRm