Test strips are not accurate enough. There is a possibility of false-negative or false-positive test paper, if the test paper is a bar, for this case, you need to further check the blood HCG value. If the blood HCG value rises, suggesting pregnancy, the test paper appears false negative possibility; if the blood HCG value does not rise, suggesting that there is no pregnancy. If the test paper suggests pregnancy, you need to further check the gynecological ultrasound for a clear diagnosis, if the gynecological ultrasound suggests early pregnancy in the uterus, the patient is pregnant; if the gynecological ultrasound suggests that there is no pregnancy, in this case, you need to further draw blood to check the value of HCG, according to the value of HCG to determine whether there is a possibility of pregnancy.