Without intratesticular testosterone spermatogenesis is impaired, and by replacing lost LH production with hCG, spermatogenesis can be restored by restoring adequate levels of intratesticular testosterone. Human chorionic gonadotropin (HCG) and a recombinant formulation, called choriogonadotropin alfa (r-HCG), is a gonad-stimulating polypeptide hormone normally secreted by the placenta during pregnancy. The...