RESUMO
The following work was performed on 30 selected cows of local breed aged about two years. During follicular and luteal phases, blood samples were collected and sera separated for assaying total calcium and inorganic phosphorus. Endometrial scrapings were collected for determination of total protein, ascorbic acid, alkaline and acid phosphatases. The results revealed that, at the follicular phase serum calcium level was significantly lowered and inorganic phosphorus was significantly raised as compared with the luteal phase. On the other h and, the levels of total protein, ascorbic acid, alkaline and acid phosphatases in the endometrial tissue were significantly higher at the luteal phase than at the follicular phase. These biochemical alterations, later on, may be found promising as indices in the evaluation of the reproductive status in cows