Hyperthyroidism must be treated regularly, and the treatment of hyperthyroidism thioureas, including thiouracil and propyl thiouracil, can reach the fetus through the placenta, and excessive doses can cause fetal brain dysplasia, and can cause fetal goiter and hypothyroidism, and a huge thyroid gland can cause fetal delivery difficulties and asphyxia. And thiourea drugs can be excreted through breast milk, so breastfeeding is contraindicated, and at the same time, hyperthyroidism pregnant women with insulin may also bring some adverse effects on the fetus and newborn. In addition, hyperthyroidism pregnancy can aggravate the condition of hyperthyroid patients, and even cause more serious complications. The number of premature births, miscarriages and stillbirths in hyperthyroid pregnancies is also high. Therefore, it is considered appropriate for married women with hyperthyroidism to actively treat their hyperthyroidism and wait until it is cured before becoming pregnant.