What is the HCG level indicating pregnancy?

Generally, when the hCG index exceeds 10mIU/ml, a clear diagnosis of pregnancy can be made. Typically, when the blood hCG level reaches around 5mIU/ml, the possibility of pregnancy is considered; when it exceeds 10mIU/ml, a definitive diagnosis of pregnancy can be made. This is because after the fertilized egg implants, it begins to secrete hCG, which gradually enters the maternal bloodstream, and its level changes can be detected through blood tests. After pregnancy, hCG levels tend to double. For example, in early pregnancy, hCG levels may double every two days. By 6-8 weeks of gestation, hCG reaches its peak in the blood, which can reach 15000-200000mIU/ml. Subsequently, hCG levels gradually decline but remain at a certain level until delivery. Since different hospitals may use different testing methods and reagent kits, the reference values/ranges for hCG may vary. Generally, each hospital will attach normal reference ranges to the test report for patients' reference. If there are any concerns or abnormalities, it is recommended to seek medical advice from a professional promptly.