Thyroid peroxidase (TPO ... if the disease is subclinical with high TSH and normal free thyroid hormones (T4 and T3), some experts discourage TPO antibody testing. Doing so may lead you to ...

Anti-TPO - Antithyroid peroxidase (anti-TPO) antibodies to thyroid peroxidase ... they belong to the IgG class. High TSI in the mother is strongly predictive of fetal or neonatal hyperthyroidism.