The triple A test can clarify the specific effects of thyroid function changes on pregnancy. If it is clear from the test that the patient has hyperthyroidism, the pregnant woman may have hyperphagia, wasting, rapid heart rate disorders, etc., which may cause metabolic disorders in the fetus and may lead to pre-eclampsia and miscarriage. If the patient has hypothyroidism, mucinous edema and depression may occur, and the fetus may suffer from intrauterine growth retardation and dysplasia, and some patients may suffer from fetal malformation, which may have serious effects on the fetus. Pregnant women need to have their thyroid function checked during pregnancy to maintain a stable level of thyroid hormones to help reduce the occurrence of the disease.