title: Serum prolactin and growth hormone in Holstein bulls.
mesh_terms: D000367:Age Factors; D000818:Animals; D002417:Cattle / Q000097:blood*; D013006:Growth Hormone / Q000097:blood*; D008297:Male; D011388:Prolactin / Q000097:blood*; D012098:Reproduction; D012621:Seasons
chemical_list: D011388:Prolactin; D013006:Growth Hormone