Microsomal fractions from dissected tissues were incubated with a saturating concentration of [3H]progesterone. The amount of [3H]DHP formed was the index of 5α-reductase activity. Values represent the mean ± SEM for the number of animals in parentheses. Data were combined for the two replicates per line at each time point. +P ≤ 0.10, *P ≤ 0.05, **P ≤ 0.01 vs. respective air control, Tukey’s post-hoc test &P < 0.05, &&&P = 0.001 vs. respective WSP, t-test