TG and hyperthyroidism: At that point, thyroid hormones and TSH levels (Figure 2) were consistent with hyperthyroidism (fT3 5.4 pg/ml (n.v. 2.3-4.2), fT4 34.7 pg/ml (n.v. 8.5-15.5), TSH 0.03 UI/ml (n.v. 0.35-8)), probably due to maternal antithyroid drug clearance.