Antithyroid peroxidase antibody is a sensitive indicator for detecting autoimmune thyroid diseases. Pregnant women with high antithyroid peroxidase antibody in thyroid function tests may be suffering from diseases such as hypothyroidism, autoimmune thyroiditis, etc., which need to be treated according to the cause of the disease. 1. Simply high anti-thyroid peroxidase antibody suggests that there is autoimmune reaction causing damage to the thyroid gland. If the patient’s thyroid function and thyroid ultrasound are normal, usually no special treatment is needed, and changes in the indexes as well as clinical symptoms should be closely observed. 2. If pregnant women have high anti-thyroid peroxidase antibodies and hypothyroidism, free T3 and T4 are obviously reduced, and thyroid stimulating hormone level is obviously increased, they need to use levothyroxine sodium tablets and so on. Specific medication needs to follow the doctor’s instructions. If a pregnant woman has high anti-thyroid peroxidase antibodies, it is recommended that she consult a doctor in a timely manner for standardized treatment under the guidance of a specialist.