The HCG value without pregnancy is less than 10ug/L, but different hospitals use different reagents and the normal range may vary, usually the reference value is attached to the report sheet, it is best to use the reference value from the local hospital as a reference to determine whether you are pregnant. If the HCG is not elevated through the blood test, pregnancy cannot be completely ruled out. It may be that the blood test is too early and the HCG value in the body is not yet elevated, it is recommended to recheck after 1 week, if it is not yet elevated, pregnancy can be completely ruled out. Under normal circumstances, you can take a blood test about 10 days after intercourse to see if you are pregnant, you can go to a regular hospital for the test, so that the test results are relatively accurate. If the HCG exceeds 10ug/L, pregnancy is considered. The gestational sac can enter the uterine cavity in about 40 days of pregnancy, and regular ultrasound is recommended.