title: Under development in heifers treated with an estrogen-progesterone combination or melengestrol acetate.
mesh_terms: D000818:Animals; D002417:Cattle; D004967:Estrogens / Q000494:pharmacology*; D005260:Female; D008321:Mammary Glands, Animal / Q000187:drug effects / Q000254:growth & development*; D011278:Pregnanes / Q000494:pharmacology*; D011374:Progesterone / Q000494:pharmacology*
chemical_list: D004967:Estrogens; D011278:Pregnanes; D011374:Progesterone