Induction of deciduoma in pseudopregnant rats increases 3betaHSD and decreases 20alphaHSD luteal activity Pseudopregnant controls and deciduoma-bearing pseudopregnant animals were sacrificed at 18:00 h on day 11 of PSP. The CL were isolated and the activities of 3betaHSD (Panel A) and 20alphaHSD (Panel B) enzymes were measured spectrophotometrically. Results are the mean ± SEM of groups of 6–9 animals. Columns with different letters differ significantly. a vs. b, p < 0.01.