The normal value of serum thyroid stimulating hormone in normal adults is 0.35-5.5 µIU/mL, which may be slightly higher in early pregnancy, and the reference ranges may vary from hospital to hospital. Different hospitals may have different reference ranges. It is recommended to consult your local hospital for details. Pregnant women are special people, so the normal range of thyroid stimulating hormone during pregnancy is different from that of the general population, and the normal range of thyroid stimulating hormone varies during different periods of pregnancy, and may be slightly higher in early pregnancy. A high thyroid stimulating hormone level may indicate subclinical hypothyroidism or clinical hypothyroidism; a low thyroid stimulating hormone level may indicate subclinical hyperthyroidism or clinical hyperthyroidism. Pregnant women with abnormal thyrotropin levels are advised to seek medical attention.