Pregnancy test strips generally refer to early pregnancy test strips and pregnancy tests, which are a method of detecting pregnancy by measuring the level of HCG in the urine. If a pregnancy test detects the presence of HCG in the urine, it will be positive. You can usually test for pregnancy by pregnancy test paper after 14 days after intercourse during ovulation, and the test result is usually observed within 5 minutes during the operation. If two red lines of equal color appear on both the control line and the test line, it is positive, indicating a higher possibility of pregnancy; if there is only a red line on the control line and no reaction on the test line, it is negative and there is less possibility of pregnancy; if there is a positive test line and no reaction on the control line, it is a sign of test failure. If the test shows a positive result using the test strips, it is recommended to go to the hospital to confirm whether you are pregnant and to exclude the possibility of ectopic pregnancy. There have been clinical cases of pregnancy that were not detected by the test paper, and other diseases besides pregnancy, such as gravida, choriocarcinoma and ovarian tumors with endocrine function, may also show positive test paper results, so it is important to go to the hospital for confirmation.