The use of pregnancy test mainly includes checking the packaging and expiration date, testing process, results interpretation and so on. 1. Checking the package and expiration date: Observe whether the package is intact, whether the test strip is within the expiration date, whether the package is damp, etc. 2. Test process: Tear open the package and take out the test strip, measure the test end into the received urine for about 20 seconds (pay attention to the urine do not exceed the control line, that is, the observation end, the urine should be taken from the first urine in the morning, and the receiving cup should be used specially clean cup). After that, take out the test strip and lay it flat for about 1~3 minutes, not later than 5 minutes for result interpretation. 3. Interpretation of the results: If the test strip has two obvious red bars, suggesting pregnancy; if one dark and one light, suggesting possible pregnancy; if only one red bar, suggesting no pregnancy. The test result of pregnancy test stick is easily affected by objective factors, and false negative or false positive situation, therefore, in the suspicion of pregnancy should do blood HCG test to confirm the diagnosis.