were measured with time-resolved FIA kits (DELFIA
Testosterone and Progesterone kits; PerkinElmer, Yokohama,
Kanagawa, Japan), as reported in [24]. The detection
limit of the FIA was 1 pg/mL for testosterone and 0.05 ng/
mL for progesterone. The intra- and interassay CVs were
10.0% and 16.9% for testosterone and 8.5% and 12.4% for
progesterone, respectively.