In this Randomized Clinical Trial, after randomization children to two groups for giving NOVO recombinant growth hormone or Samen recombinant growth hormone, we will evaluate children for 2 years. Our lababoratory tests include complete blood cell, blood urea nitrogen, creatinine,Na,potassium, insulin growth factor-1,Serum glutamic oxaloacetic transaminase,Serum glutamic pyruvic transaminase,alkaline phosphatase, phosphor,25-hydroxy vitamin D,bone age,height, weight, height standard deviation score, weight standard deviation score ,pubertal stage before starting study. We will repeat most of above exams in 1 month, 2 month, 3 month, 4month, 5 month, 6 month,12 month, 18 month, and finally in 24 month. We will record growth velocity in these times. Finally compare the results of these two groups and report them.