The range of blood HCG values after pregnancy varies greatly among individuals, and the main observation is the doubling of the growth to determine if it is normal. The normal value of HCG is 0-10 miu/ml, and as long as it exceeds 30, it can be judged as pregnancy. In the early stages of pregnancy, the rate of increase of blood HCG should be doubled every other day or at least increased by more than 60%. When the patient’s blood HCG exceeds 2000, a doubling between 2000-4000 once every 3 days or so is considered normal. When HCG exceeds 4000-9000, doubling takes about 4-5 days. The rate of increase of HCG will become slower and slower as the pregnancy progresses, reaching a peak in about two months of pregnancy.