High thyroid hormone in pregnancy requires thyroid hormone supplementation, i.e., eugenol, to maintain thyroid hormone in the appropriate range. It is recommended to maintain thyroid hormone at 0.1-2.5 mIU/L in the early 0-3 months of pregnancy, 0.2-3.0 mIU/L in the middle of pregnancy, and 0.3-3.0 mIU/L in the late pregnancy. If a pregnant woman suffers from hypothyroidism during pregnancy, the thyroid hormone dose usually has to be increased by 25%-30% after pregnancy. During pregnancy, thyroid function needs to be checked every four weeks, and the medication dose can be adjusted at any time according to the thyroid function.