The normal range of alpha-fetoprotein is less than 25 μg/L. Increased indicators may be caused by physiological or pathological factors. Alpha-fetoprotein is a tumor marker with a normal range of <25 μg/L. Elevated levels can be used to aid in the diagnosis of primary liver cancer as well as other malignant tumors. Fetoprotein levels are elevated during pregnancy. Significantly elevated alpha-fetoprotein during pregnancy may indicate fetal neural tube malformation, preeclampsia, and so on. In patients with primary liver cancer, alpha-fetoprotein levels are elevated. In patients with viral hepatitis, alpha-fetoprotein levels may also be elevated to varying degrees. Abnormalities in alpha-fetoprotein levels suggest prompt hospitalization.