Hyperthyroidism, short for hyperthyroidism, is a thyrotoxicosis caused by excessive production of thyroid hormones by the thyroid glands themselves. Its causes include diffuse toxic goiter (Graves’ disease), nodular toxic goiter and autonomic hyperfunctioning adenoma of the thyroid gland. Hyperthyroidism in pregnancy is unique in that it can be harmful to both the pregnant woman and the fetus. Maternal thyroid stimulating receptor stimulating antibodies (TSAb) can cross the placenta to stimulate the fetal thyroid gland causing fetal or neonatal hyperthyroidism. The negative effects of hyperthyroidism on pregnancy are mainly miscarriage, preterm delivery, pre-eclampsia, and placental abruption. And after delivery, due to the release of immunosuppression, diffuse toxic goiter is easy to occur, called postpartum diffuse toxic goiter. Therefore, if the patient’s hyperthyroidism is not controlled, it is recommended not to get pregnant; if the patient is receiving antithyroid medication and the serum TT₃ and TT₄ reach the normal range, stop the antithyroid medication or apply the minimum dose of antithyroid medication, you can get pregnant; if the patient is hyperthyroidism found during pregnancy and chooses to continue the pregnancy, in principle, antithyroid medication and pregnancy If the patient chooses to continue with the pregnancy, in principle, anti-thyroid medication and surgical treatment in the middle of pregnancy will be performed. As mentioned above, whether a patient with hyperthyroidism can get pregnant depends on whether the patient’s hyperthyroidism is under control. For the health of the pregnant woman and the fetus, pregnancy is not recommended for patients with uncontrolled hyperthyroidism; if the patient’s hyperthyroidism is under control, pregnancy is possible.