This Study was carried-out in Karahta station for improvement of Shami goats, Directorate of Animal Production Research, Ministry of Agriculture and Agrarian Reform. Fifty growing Shami male goats aged ٣ months, were used to measure the growth rate of testicular parameters, their relation to the development of body weight and the effect of several factors on their development from weaning at ٣ months to ٢١ months of age. All kids housed and managed under the same conditions.