A value of HCG greater than 10 mIU/mL indicates a possible pregnancy. Clinically, it is not only judged by the level of HCG, but also combined with the clinical history, such as whether there is a history of menopause, and it is important to monitor the rise of blood HCG, such as checking every other day, if the blood HCG doubles from the original one, it indicates a very high possibility of intrauterine pregnancy. If it rises only a little, the possibility of ectopic pregnancy needs to be clinically ruled out, so blood HCG is an important indicator for the diagnosis of early pregnancy and the diagnosis of ectopic pregnancy. Other diseases may also cause an increase in HCG, so a combination of medical history is recommended. If a woman of childbearing age is not using contraception and has a history of menopause, a rise in blood HCG after a blood test would indicate the possibility of pregnancy.