The HCG value at five weeks of pregnancy is 2580-6530 U/L, and the exact value will vary from person to person. HCG is the English abbreviation for human chorionic gonadotropin, which is secreted by the trophoblast cells that differentiate after the fertilized egg is laid, and then rises by a factor of 1 every 1.7-2 days to 5 weeks of pregnancy, i.e., 35 days of gestation, when the normal level of human chorionic gonadotropin rises to 2,580- 6,530 U/L, with an average value of 4,090 U/L. Measurement of human chorionic gonadotropin levels can help to diagnose pregnancy-related diseases and speculate on the development of the embryo. If the human chorionic gonadotropin level is lower than the normal level, it is necessary to rule out ectopic pregnancy or embryonic dysplasia after checking the gestational week; if the human chorionic gonadotropin level is too high, it is necessary to clarify whether it is a trophoblastic disease or not, after ruling out pregnancy. When the patient’s test results are abnormal, he should seek medical treatment in time, and should not ignore the condition, so as not to lead to adverse consequences.