title: Effects of oral melengestrol acetate and a testosterone-diethylstilbestrol implant, breed and age on growth and carcass traits of beef heifers.
mesh_terms: D000367:Age Factors; D000818:Animals; D001835:Body Weight / Q000187:drug effects; D002417:Cattle / Q000254:growth & development*; D004054:Diethylstilbestrol / Q000494:pharmacology*; D011278:Pregnanes / Q000494:pharmacology*; D013739:Testosterone / Q000494:pharmacology*
chemical_list: D011278:Pregnanes; D013739:Testosterone; D004054:Diethylstilbestrol