LR3 IGF 1 (Human), Recombinant Protein, CHO, Tag Free Growth Hormone and Insulin like Growth Factor I: Novel Insights into the Male Reproductive Health IntechOpen HGH IGF Penis Growth Retrovirus Therapy: What the Evidence Actually Shows IGF 1 levels are significantly correlated with patient reported measures of sexual function International Journal of Impotence Research IGF 1 LR3 does not promote growth in late gestation growth restricted fetal sheep American Journal of Physiology Endocrinology and Metabolism American Physiological Society The GH IGF 1 axis in ageing and longevity Nature Reviews Endocrinology