The difference between the 6-week and 7-week blood tests is that the values of human chorionic gonadotropin are different, but the results are the same.
Generally after the formation of fertilized egg, human chorionic gonadotropin starts to be secreted, and generally reaches its peak at 8 to 10 weeks of pregnancy. Therefore, when taking blood test, the level of human chorionic gonadotropin is higher at 7 weeks than that at 6 weeks of pregnancy, but generally the results are the same, and it is possible to check whether you are pregnant or not.
Generally, the hcg level at six weeks of pregnancy is between 10,000 and 100,000 IU/L, and at seven weeks of pregnancy it is between 15,000 and 200,000 IU/L. If there is any abnormality, you should consult a doctor in time for diagnosis and treatment.