J Dairy Sci. J. Dairy Sci. J. Dairy Sci. Consequently, placental hormones may affect mammary function. Although relatively little placental lactogen is released into the mother's blood in the cow, bovine placental lactogen administration during lactation will increase milk yield in dairy cattle.
Adrenal glucocorticoids can inhibit lactation at high doses.
In ruminants, the effects of high doses of glucocorticoid is inhibitory, but the effects of lower doses are ambiguous, depending on the study evaluated. Cortisol administration will reverse this. Adrenalectomy-ovariectomy stops lactation completely. In the rat, adrenal secretions are limiting. Adrenal corticosterone content also declines, but blood concentrations are unchanged.