Patients with hypothyroidism can get pregnant, but first of all, thyroid function must be normalized and thyrotropin must be adjusted to below 2.5 mIU/L. If thyroid function is not normalized, she cannot conceive or her chances of conceiving are low. If the thyroid function is not normalized, she will not be able to conceive, or her chances of conceiving are very low, and even if she does conceive, it will easily lead to miscarriage and fetal developmental disorders. Fetal brain development disorders, such as postnatal cretinism or other abnormalities, are also more likely to lead to miscarriage. The most common is that many people do not know they have hypothyroidism before, so they do not treat it regularly after conceiving, and they do not review it regularly, and then they find out they have miscarriage all the time. Therefore, after the discovery of hypothyroidism, it is necessary to systematically treat it in the endocrinology department, using thyroid hormone replacement therapy, and regularly review it to bring her thyroid function up to the standard before pregnancy, in order to achieve the goal of eugenics. During pregnancy, in addition to review in the endocrinology department, you also need to go to the obstetrics department regularly for fetal monitoring, which is very important. As long as the hypothyroidism is well controlled, the patient can still have a healthy baby normally.