The effect of HCG was examined in 160 infertile patients. The first group of patients (100 men) received 1500 I.U. HCG twice weekly for 8 weeks, the second group (60 men) was given 1500 I.U. HCG twice weekly for 12 weeks. Serum testosterone level was found to be increased after treatment in 44 cases. Improvement was reported on potentia coeundi. The spermiogram improved in 34 per cent of the cases. During the period of treatment 25 wives became pregnant.