The key is to see if the high level of anti-thyroglobulin antibodies will affect the level of thyroid hormones, especially thyroid stimulating hormones, and if it leads to high thyroid stimulating hormone levels, it will affect the mental development of the fetus to some extent. If a pregnant woman has a high level of anti-thyroglobulin antibodies, but the thyroid function test indicates that the thyroid stimulating hormone level is less than 2.5 mU/L, no intervention is needed. On the contrary, if the thyroid hormone level exceeds 2.5 mU/L or even 4 mU/L, oral euthyroid therapy is needed to bring the thyroid hormone level down to 2.5 mU/L as much as possible, which is more beneficial to the development of the fetus, especially the development of intelligence.