This study involved 40 cases with hypogonadotropic hypogonadism and 30 healthy controls. Relevant data, on their level of the serum calcium, phosphorus, Alkalin phosphatase and testosterone, together with personal information were gathered and put into statistical analysis with SPSS using paired-t-test (P<0.05). The results indicated a significant difference between the two groups as for serum calcium and phosphorus. It was also shown that after puberty, there was no relationship between Alkalin phosphatase and testosterone. Further elaboration on the results may be found in the original study.