to address these questions , the effects of prl-secreting ectopic pituitary grafts on hypothalamic catecholamine metabolism and the effects of experimental manipulations of catecholamine metabolism on prl and gonadotropin secretion were evaluated in adult male hamsters exposed to a 14 h light : 10 h dark ( 14l:10d ) or a 5l:19d photoperiod .
C1327616
secreting
C0033371
prl