Frontiers Sheep recombinant IGF 1 promotes organ specific growth in fetal sheep IGF 1: Miracle Hormone or Health Hazard? Diet vs Disease Attenuated glucose stimulated insulin secretion during an acute IGF 1 LR3 infusion into fetal sheep does not persist in isolated islets Journal of Developmental Origins of Health and Disease Cambridge Core IGF 1 LR3 does not promote growth in late gestation growth restricted fetal sheep American Journal of Physiology Endocrinology and Metabolism American Physiological Society ORF Genetics ISOkine IGF 1 LR3 Growth Factor Igf Lr3 Peptide Dosing Chart TikTok