Abstract
Serum ˜5 -Nucleotidase , Alkaline phosphatase activities and Calcium concentration were measured in forty- two pregnant women with some bone diseases. As well as in twenty- five healthy women as control group. In comparison to control group. The results show significant increase in serum ˜5 -Nucleotidase and Alkaline phosphatase activities and Significant decrease in serum calcium concentration in all patients.