Women with hyperthyroidism often have abnormal menstruation and anovulation, making pregnancy less likely. Hyperthyroidism is a disorder caused by disturbances in basal metabolism. Patients may experience panic attacks, tachycardia, shortness of breath, excessive sweating, fear of heat, increased appetite, and nervousness. It is not easy to conceive with hyperthyroidism, but not all women with hyperthyroidism cannot get pregnant. Once a woman with hyperthyroidism becomes pregnant, she is prone to miscarriage, stillbirth and premature birth, which are significantly higher than in normal women. Pregnancy can affect the physiological hormone levels of hyperthyroidism patients, causing changes in their hyperthyroidism symptoms and in some cases, worsening their condition. If a pregnant woman takes a high dose of antithyroid medication during pregnancy, it can suppress the thyroid function of the fetus, thus causing congenital hypothyroidism (low thyroid) in the fetus and leading to cretinism after birth. If radioactive iodine is used to treat hyperthyroidism during pregnancy, the fetus will be affected by excessive exposure to radiation, resulting in serious consequences, and the pregnancy should be terminated. If a pregnant woman develops hypothyroidism, the effects on the fetus are greater than if she has hyperthyroidism, and the rate of fetal miscarriage and perinatal mortality is increased. Pregnancy in patients with severe hyperthyroidism is dangerous and detrimental to both the mother and the baby, and pregnancy can be delayed until the hyperthyroidism is cured or stabilized.