Sterility denotations and a grading system for bovine reproducton.
D000818:Animals; D002417:Cattle / Q000033:anatomy & histology / Q000502:physiology*; D002418:Cattle Diseases / Q000175:diagnosis*; D005260:Female; D007247:Infertility, Female / Q000175:diagnosis / Q000662:veterinary*; D011247:Pregnancy; D012098:Reproduction