these results indicate that the ability of prolactin ( secreted by the grafted pituitary ) to increase testicular size and the responsiveness of the hypothalamic-pituitary system to prolactin gradually increase during short photoperiod-induced testicular regression , are maximal when the testes are fully regressed and decrease again during spontaneous redevelopment of the testes .
C1327616
secreted
C0033371
prolactin