If a woman with hypothyroidism has an unplanned pregnancy, she should go to the hospital to have her thyroid function checked, take medication under her doctor’s supervision to restore her thyroid function as soon as possible, and undergo regular pregnancy checkups. Pregnancy with hypothyroidism increases the risk of miscarriage and preterm delivery, and may also affect the development of the fetus if the thyroid function is not corrected in time. Therefore, it is generally not recommended for women with uncontrolled hypothyroidism to become pregnant. However, in the event of an unplanned pregnancy, the dosage of levothyroxine sodium tablets should be adjusted in a timely manner under the guidance of a doctor, and the specifics should be in accordance with the doctor’s instructions. At the same time, regular fetal monitoring should be conducted during pregnancy to avoid abnormal fetus, and if abnormalities are found, the need for termination of pregnancy should be considered under medical evaluation.