Hyperthyroidism can easily lead to miscarriage and needs to be treated aggressively under the supervision of a doctor. The full name of hyperthyroidism is hyperthyroidism. Hyperthyroidism is prone to miscarriage and pregnant women with hyperthyroidism are advised to undergo regular reviews. Hyperthyroidism can be combined with a rise in norepinephrine and angiotensin, vasoconstrictor substances that cause abnormal spasms of blood vessels, which in turn lead to abnormal contractions and ultimately miscarriage. Thyroid hormones are also involved in the metabolism of follicle-stimulating hormone and luteinizing hormone. Abnormalities in thyroid hormone secretion can cause abnormalities in the metabolism of sex hormones, which can also lead to miscarriage. It is generally recommended that hyperthyroidism be cured before pregnancy, and pregnant women with hyperthyroidism should be treated under medical supervision.