in unstressed rats the increase in serum progesterone over control values after five daily injections of 2.5 mg ph/kg body wt could be attributed to decreased 20alpha-reduction of progesterone , but when the dose of ph was increased to 5.0 mg/kg , a highly significant increase in both progesterone and total progestins occurred indicating that prolactin can increase steroidogenesis as well as reduce 20alpha-hydroxysteroid dehydrogenase activity .
C0033308
progesterone
C0033306
progestins