HCG is also called human chorionic gonadotropin, the normal value of HCG in women after pregnancy, will gradually decrease with the growth of pregnancy week after 12 weeks, the normal value of blood HCG when not pregnant is less than 1IU/L, if the value of HCG is more than 10IU/L is highly suspected of early pregnancy. After pregnancy, the HCG value normally doubles every other day and reaches 100,000 IU/L at 10 weeks of pregnancy, and then decreases slightly and remains around 80,000 IU/L until the end of pregnancy. As long as the HCG value is doubled every other day, a full gestational sac and fetal heartbeat can be found in the uterine cavity at about 40 days after menopause, and women do not have lower abdominal pain or vaginal bleeding, regular obstetric checkups can be done later.