[Twin calving in several cattle breeds and its effect on future fertility and milk yield].
D000818:Animals; D002417:Cattle / Q000502:physiology*; D005260:Female; D005298:Fertility; D006824:Hybridization, Genetic; D007774:Lactation; D011247:Pregnancy; D011270:Pregnancy, Animal; D011272:Pregnancy, Multiple; D013045:Species Specificity
Porody dvojcat u nĕkterých plemen skotu a jejich vliv na dalsí plodnost a mlécnou uzitkovost