Transferrin expression was decreased in AT rats (1.83 ± 0.43 points, p < 0.001 vs groups CO and AT+IGF) as compared with controls (3.85 ± 0.15 points) and to rats with testicular atrophy receiving IGF-I (2.60 ± 0.30 points, p < 0.001 vs groups CO and AT+IGF). Here, IGF1 is linked to Testicular atrophy.