Fig. 5.
The activity of 3β-hydroxysteroid dehydrogenase/Δ5-Δ4 isomerase (3β-HSD) conversion of PREG into progesterone in the porcine endometrium and myometrium collected during days 10 to 11, 12 to 13 and 15 to 16 of pregnancy and the estrous cycle (n=4 in each period). Values are expressed as the mean ± SEM. Different small letters (a, b) indicate significant differences in 3β-HSD activity between different days within the same examined period (P<0.05). Asterisks (*, **) indicate statistically significant differences in 3β-HSD activity between the same days of different periods (* 0.01≤P≤0.05, ** 0.001<P<0.01).