Self-testing for pregnancy is mainly done through the early pregnancy test paper, which is generally more accurate, but there is no relevant data on its specific probability. If you want to test yourself more accurately, you should pay attention to whether the test paper is in the shelf life, the use of morning urine, more than two weeks of coitus, or has been delayed menstruation before testing. 1. Pay attention to whether the test paper is within the shelf life: if the test paper is broken or not within the shelf life, false negative or false positive results may occur. 2. Use morning urine: for patients with short time of menopause, it is recommended to check the early pregnancy test paper after the first morning urination, and the results of the first morning urination test are more accurate; the early pregnancy test paper test for patients with longer time of menopause is relatively less demanding. 3. Test after more than two weeks of coitus or delayed menstruation: the result will be more accurate. Positive urine HCG, need to further consult the hospital, blood HCG or ultrasound examination to assess the embryonic development.