HCG values between approximately 10,000 and 220,000lU/l are normal at 7 weeks of pregnancy. At 7 weeks of pregnancy, the normal range of HCG values in a pregnant woman’s blood is approximately between 10,000 and 220,000lU/l. In the early stages of pregnancy, progesterone and HCG levels increase significantly, and blood HCG levels, in particular, may double every other day. If there is no doubling or a decrease in blood HCG, accompanied by a decrease in progesterone, it may be a sign of preterm miscarriage. During pregnancy, pregnant women need to do blood HCG, blood progesterone test, pelvic ultrasound and other tests, which can clearly understand the growth and development of the fetus and the condition of fetal appendages, so as to facilitate the timely detection of the condition and timely diagnosis and treatment.