[Electrolytes in bovine intrauterine secretions in infertility sine material]

Serum and uterine secretions Na, K, Ca, Mg and P were studied in 15 normally reproducing and in 15 repeat-breeder cows. No cyclical variations were noted for these elements in the serum whereas the normal group showed cyclical and significant K, Mg and P variations (P <0.05) in the uterine secretions. The concentration of the studied uterine elements, with the exception of P, correlated with the concentration of their homologue in the serum at different stages of the cycle. It is believed that the concentration of serum Na, K, Mg and Ca maintains the intrauterine concentrations at the physiological level for the survival of the gametes and the embryo. Significant differences in the uterine concentrations of Na, K and P were noted between the groups at different stages of the cycle. These various concentrations as well as the nonsignificant variations of the uterine secretions might explain the infertility in the abnormal group.