Abstract : Early surgical interference for some infants with an Erb’s palsy might be an essential issue to improve prognosis in certain cases. This study aimed to take the optimal clinical decision for surgical interference of infants with Erb’s palsy in an objective way and without exploration surgery. Sixty-one infants with Erb’s palsy from both genders participated in this study. They were classified into two groups according to age, group I includes first 3 months of age and group II includes second 3 months of age. In this study, evaluation of biceps brachii was done through observation of its contraction by using Active Movement Scale, Percentage of Nerve Degeneration and distal latency was done by Electroneurography. The scores for biceps contraction, percentage of degeneration and distal latency were recorded for the two groups. There was strong inverse relation between Percentage of Nerve Degeneration, distal latency and Active Movement Scale and there was weak inverse relation between Percentage of Nerve Degeneration, distal latency and the age for both groups. Also, there was weak direct relation between scores of active movement scale age in both groups. The weak relation between age and percentage of degeneration, distal latency and scores of active movement gave us a conclusion that there is no need for delaying surgical interference till the age of 6 months after Erb’s palsy and early surgical interference at the age of 3 months is more beneficial for more improvement in infants with an Erb’s palsy