Human LR3 IGF I Recombinant Protein Suitable for Cell Culture Ilex Life Sciences LR3 IGF 1 (Human), Recombinant Protein, CHO, Tag Free IGF 1 levels are significantly correlated with patient reported measures of sexual function International Journal of Impotence Research PDF) Effect of insulin like growth factor I treatment on serum androgens and testicular and penile size in males with Laron syndrome (primary growth hormone resistance) IGF 1 LR3 does not promote growth in late gestation growth restricted fetal sheep American Journal of Physiology Endocrinology and Metabolism American Physiological Society