Hyperthyroidism is short for hyperthyroidism. If the patient’s hyperthyroidism is not under control, pregnancy is not recommended; if the patient is being treated with antithyroid medication and the serum total triiodothyronine and total thyroxine are in the normal range, pregnancy can occur 3 months after discontinuing the antithyroid medication. The main negative effects of hyperthyroidism on pregnancy are miscarriage, preterm labor, pregnancy-associated hypertension, low-birth-weight babies, intrauterine growth restriction, stillbirth, thyroid crisis, and heart failure. Antithyroid medications can cause fetal skin dysplasia, postnasal atresia, esophageal atresia, and umbilical protrusion. If possible, do not take antithyroid drugs in pregnancy. It is recommended to consult a medical professional in detail whether a patient with hyperthyroidism is suitable for pregnancy.