title: Regulation of egg output of populations of Ostertagia ostertagi.
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases; D003348:Cortisone / Q000494:pharmacology; D005243:Feces / Q000032:analysis; D005260:Female; D010060:Ovulation; D010063:Ovum; D014251:Trichostrongyloidea / Q000502:physiology*; D014252:Trichostrongyloidiasis
chemical_list: D003348:Cortisone