HCG should be around 6000~10000mIU/ml for 40 days of pregnancy, and HCG 8600mIU indicates that the value is normal, but it does not mean that the fetus is necessarily normal. Blood HCG on day 40 of pregnancy should normally be around 6000~10000mIU/ml, but since blood HCG varies greatly from one pregnancy to another, it is generally not possible to determine whether the baby is normal or not by calculating the normal value of HCG for the days of pregnancy. Rather, it is necessary to observe the HCG doubling every other day through dynamic observation, together with other auxiliary examinations, such as ultrasound. Only if the doubling every other day is good, the progesterone level is also above 20ng/ml, and the ultrasound shows no abnormality, etc., it can usually be proved that the development of the embryo is normal. It is recommended that pregnant women do a good job of pregnancy health care during pregnancy, regular maternity checkups, maintain a relaxed mood, avoid excessive anxiety, and if there are any abnormalities promptly consult a doctor to improve the relevant examinations and standardize the treatment.