[Differences in cross-breed's and age in bulls as reflected on spermiogram].
D000367:Age Factors; D000818:Animals; D001947:Breeding; D002417:Cattle; D003462:Cuba; D005298:Fertility; D008297:Male; D013091:Spermatogenesis; D013094:Spermatozoa / Q000002:abnormalities / Q000254:growth & development* / Q000502:physiology
Meziplemenné a vĕkové rozdíly v differciálním speriogramu u býků.