[The neuroendocrine aspects of the participation of the epiphysis in the regulation of lactation].

Pinealectomy was shown to suppress the milk ejection reflex and increase the luteinizing hormone secretion in lactating rats. Suckling caused the same type changes of prolactin though at a lower level, in these rats. The data obtained suggest that the pineal gland together with the oxytocinergic system are involved in complex mechanisms of neurohumoral regulation of the lactogenic and gonadotropic hormones secretion during lactation.