[Permissible errors in the study of cows for pregnancy].
D000818:Animals; D002417:Cattle; D003951:Diagnostic Errors / Q000662:veterinary; D005260:Female; D007247:Infertility, Female / Q000662:veterinary*; D011247:Pregnancy; D011258:Pregnancy Tests / Q000662:veterinary*; D011270:Pregnancy, Animal
Ob oshibkakh, dopuskaemykh pri issledovanii korov na beremennost.