For young female hyperthyroidism patients, their condition can be controlled through regular and effective anti-thyroid medication, and pregnancy after stopping the medication will have no adverse effects on the mother and fetus. However, many patients with hyperthyroidism have relapsed after stopping the medication, and they are afraid that the medication will affect the fetus. So when is the best time to get pregnant? What should be done after pregnancy? 1. There is no difference in the age of pregnancy between hyperthyroid women and normal women. 2, anti-thyroid drugs are the most common treatment for hyperthyroidism combined with pregnancy, the original hyperthyroidism, it is best to get pregnant during the maintenance phase, so the dose of drugs is small, the impact on the pregnant woman and the fetus is also less, especially for those who relapse after stopping the drugs; for hyperthyroidism in pregnancy, the dose should also be smaller than that of non-pregnant hyperthyroidism, the preferred drug is propylthioxypyrimethamine (because its amount through the placenta is less than that of methylthioxypyrimethamine and tabazol, hyperthyroidism). After the symptoms of hyperthyroidism are controlled, the dose should be reduced to maintenance dose as soon as possible so that the thyroid function can be maintained at a slightly higher level than normal. Pregnant women have better tolerance for mild hyperthyroidism in order to avoid over-treatment, which may lead to hypothyroidism in pregnant women and fetuses, or fetal goiter, and additional thyroid preparations may be used if necessary. Isotope therapy is not recommended during pregnancy, especially during the 12th-14th weeks of pregnancy, because the fetal thyroid gland has the function of gathering isotope iodine, resulting in goiter and hypothyroidism, which affects fetal brain development and intelligence. 4, pregnancy is usually not suitable for total thyroidectomy, if the patient can not tolerate drugs or leukopenia and must be operated, can be arranged in the fourth to sixth month of pregnancy. 5.Prozacolol (insulin) can cause continuous contraction of the uterine m, resulting in small placenta and fetal growth retardation, bradycardia, preterm delivery, neonatal respiratory depression, and should not be used. 6.Anti-thyroid drugs can be secreted from breast milk, so it is not suitable for breastfeeding. If you must breastfeed, choose propylthioxypyrimethamine which is less through breast milk, the dose should be small, and monitor the baby’s T3, T4 and TSH. 7.After delivery, attention should be paid to the recurrence of hyperthyroidism.