Prenatal Diagnosis of Fetal Goiter in a Euthyroid Mother

revealed a fetal goiter. The maternal history and thyroid function tests, including antithyroid autoantibody tests, were unremarkable. Cesarean section was performed, and the thyroid profile of the neonate was consistent with congenital hypothyroidism. Thyroxine therapy was immediately started. Fetal thyroid function must be determined when a goiter is detected. Cordocentesis is a more reliable but riskier diagnostic tool than amniocentesis. Intra-amniotic injection of thyroxine is relatively safe and an easier management option for fetal hypothyroidism. To develop more noninvasive and safe methods for therapeutic efficacy monitoring, a large-scale study is necessary.