Resumo: O estudo dos macroelementos (calcio, fosforo e magnesio) foi realizado para estabelecer os niveis normais, em cabras criadas na regiao semi-arida do Nordeste. Com essa finalidade foi utilizado um lote de 153 animais, das racas mestica Anglo-Nubiana, Caninde-Repartida, Moxoto e Sem Raca Definida, durante varios estados fisiologicos: antes, inicio e termino da prenhez, e lactacao. Do estudo dos macroelementos resultou uma relacao altamente significante (P<0,0005) da concentracao do calcio com as racas e os estados fisiologicos. O elemento fosforo variou (P<0,005) apenas entre racas, e o magnesio nao sofreu influencia dos fatores considerados. [Biochemical values in the goat's blood serum related to their physiological states and race in the brazilian semi-arid northeast. II. Calcium, phosphorus and magnesium]. Abstract: This study of macro-elements (calcium, phosphorus and rnagnesiurn) was undertaken to determine their normal leveis in blood-serum of goats rnaintained in semi-and Northeast of Brazil. A group o! 153 does o! mixed Angio-Nubian, Canindé-Repartida, Marota, Moxotó and SRD breads was used and blood was collectad during different physiological states: before pregnancy, during first-third and Iast-thind of pnegnancy, and duning lactation. The results demonstrated a highly signif icant difference between breeds and between physioiogicai states (P < 0.0005) reganding calcium leveis. The levei of phosphorus varied (P < 0.005) between bneeds but not between physiologlcal states, and the levei of magnesium was not influenced by either of these factons.1985