title: Serum calcium and magnesium levels during pregnancy and at calving in heifers and young cows, and the relationship between these components and the incidence of puerperal paresis in older half-sisters.
mesh_terms: D000818:Animals; D002118:Calcium / Q000097:blood*; D002417:Cattle; D005260:Female; D014644:Genetic Variation; D007743:Labor, Obstetric; D008274:Magnesium / Q000097:blood*; D010319:Parturient Paresis / Q000097:blood / Q000235:genetics*; D010375:Pedigree; D011247:Pregnancy; D012641:Selection, Genetic
chemical_list: D008274:Magnesium; D002118:Calcium