Growth-promoting substances.
D000821:Animal Feed; D000818:Animals; D003300:Copper / Q000494:pharmacology; D004064:Digestive System / Q000382:microbiology; D005260:Female; D005503:Food Additives / Q000494:pharmacology; D006128:Growth / Q000187:drug effects*; D009747:Nutritional Physiological Phenomena; D011247:Pregnancy; D014769:Virginiamycin / Q000494:pharmacology
D005503:Food Additives; D014769:Virginiamycin; D003300:Copper