Hyperthyroidism can affect pregnancy, and uncontrolled hyperthyroidism increases adverse pregnancy events in women. Pregnancy is usually contraindicated until hyperthyroidism is cured, and uncontrolled hyperthyroidism increases a pregnant woman’s risk of miscarriage, preterm labor, stillbirth, placental abruption, and possibly hyperthyroidism crisis during delivery, which can be life-threatening in severe cases. Meanwhile, maternal thyroid-stimulating antibodies (TSAb) can stimulate the thyroid gland of the fetus through the placenta, causing fetal or neonatal hyperthyroidism. At the same time, some anti-thyroid drugs have a certain teratogenicity rate, especially methimazole can cause fetal developmental abnormalities, which is not conducive to fetal growth and development, and it is recommended that pregnancy be considered after hyperthyroidism is cured. It is recommended that patients with hyperthyroidism prepare for pregnancy under the guidance of a medical professional.