HCG value between 4500-16000mIU/ml on the 40th day of pregnancy is normal, there are differences between individuals, and the HCG value is different at different times. HCG is also known as human chorionic gonadotropin, during early pregnancy HCG value rises faster, 40 days pregnant HCG value between 4500-16000mIU/ml, HCG test can diagnose early pregnancy, can also be used to diagnose pregnancy-related diseases, such as trophoblastic tumors and so on. Under normal circumstances, early pregnancy HCG will be doubled every other day, progesterone is also gradually rising, indicating that the embryo is well developed, at this time is generally not accompanied by vaginal bleeding, abdominal pain symptoms. Some women in the early stages of pregnancy HCG rise slowly or do not rise instead of falling, this situation should be considered to be embryonic dysplasia, ectopic pregnancy, HCG doubling good and fast growth rate, may be a multiple pregnancy, grapes. After pregnancy, do a good job of maternity checkups during pregnancy to be able to detect problems in time and deal with them promptly.