The symptoms of hypothyroidism in pregnant women are similar to those of ordinary hypothyroidism patients, including mental depression, fatigue, chills, slow reaction, memory loss, etc. Some patients also have digestive system symptoms such as decreased appetite, abdominal pain, nausea, vomiting, or constipation. The above symptoms may be confused with digestive system diseases or pregnant women's pregnancy reaction. Therefore, regular prenatal examination is required during pregnancy to see whether the thyroid hormone and thyroid stimulating hormone levels are normal. Hypothyroidism in pregnant women can also cause chronic osteoarthritis, leading to muscle soreness. There are even myxedema, bradycardia and other symptoms. Hypothyroidism in pregnant women also affects the development of the fetus, resulting in mental retardation, growth retardation and other phenomena in the fetus.