Human chorionic gonadotropin (HCG) 8.4ug/L may or may not be pregnant, which needs to be judged with reference to the reference values in different hospitals. The reference value of HCG is 0~5ug/L in some hospitals and 0~10ug/L in others, and the clinical significance of different reference values is different. 1. HCG reference value 0~5ug/L: HCG value of 8.4ug/L confirms the diagnosis of pregnancy, which has exceeded the normal reference value. 2. HCG reference value 0~10ug/L: HCG value 8.4ug/L can not confirm the diagnosis of pregnancy, it is within the normal range of values, you need to 3~7 days to go back to the blood test, such as again the results of the test is out of the normal range means that pregnancy. If a woman has stopped menstruating for more than a week, it is recommended that she consult a doctor for relevant tests to determine whether she is pregnant.