title: Effects of photoperiods on LH and prolactin (PRL) plasma levels in the male rat.
mesh_terms: D000375:Aging; D000818:Animals; D002369:Castration; D008027:Light; D007986:Luteinizing Hormone / Q000097:blood*; D008297:Male; D011388:Prolactin / Q000097:blood*; D051381:Rats; D013997:Time Factors
chemical_list: D011388:Prolactin; D007986:Luteinizing Hormone