title: An early morning surge of prolactin in the male rat and its abolition by pinealectomy.
mesh_terms: D000818:Animals; D008027:Light; D008297:Male; D010870:Pineal Gland / Q000502:physiology*; D011388:Prolactin / Q000097:blood*; D011863:Radioimmunoassay; D051381:Rats; D013997:Time Factors
chemical_list: D011388:Prolactin