There are two ways to determine whether it is early pregnancy: 1. For people with regular menstrual cycle, if the menstruation is delayed for more than one cycle without menstruation, you can determine whether you are pregnant by testing HCG in blood, i.e. human chorionic gonadotropin. 2. You can detect whether you are pregnant by HCG in urine, but since the concentration of HCG in urine is not as accurate as that in blood, HCG in urine can only be positive if The HCG in urine can only be positive when it reaches a certain level. Therefore, the comparison between the two methods is more accurate and reliable, while the HCG in the urine can only indicate a positive result if it reaches a certain concentration, so a negative result in the early urine test is not a 100% guarantee of pregnancy.