“…Naturally occurring androgen, as well as synthetic androstanes with predominantly anabolic properties, stimulate EP production [7,53,113,139], This apparently is accomplished by sensitizing the kidneys, and perhaps to a far lesser extent the extrarenal sites, to hypoxic stimuli [55,70]. As a consequence more EP is produced in response to any given hypoxic stimulus than is the case in comparably hypoxic animals which do not receive androgens.…”