hypophysectomy , which led to the expected fall in serum prolactin to undetectable levels , and restraint stress , which resulted in a statistically significant 4-fold rise in serum prolactin , caused no change in prolactin concentrations in the hypothalamus , indicating that brain prolactin-like substance is regulated independently of pituitary prolactin and circulating serum prolactin levels .
C0086045
concentrations
C0006104
brain