[Effect of adrenocorticotropin on the progesterone level in the peripheral blood and on adrenal progesterone production in vitro in female silver foxes].

The plasma progesterone increased following a single injection of ACTH (3 ME/kg). The progesterone production was also increased by ACTH after incubation of adrenals in vitro. The data suggest that the adrenal glands of female silver foxes are capable not only of secreting progesterone, but also of responding to ACTH with a further increase in the progesterone secretion.