Pregnancy test is a common pregnancy test tool for modern women, and it is more convenient to use this method to test for pregnancy. However, the test results of pregnancy test stick are not 100% accurate, the following six conditions will lead to inaccurate test, the specific content of the following: 1, improper operation: not in accordance with the instructions of the method of operation, testing without placing the pregnancy test stick or wetting the stick with water; 2, testing too early: pregnancy test stick is through the detection of HCG concentration in human urine to determine whether pregnancy, testing too early HCG concentration may be low, resulting in inaccurate test results; 3, drinking water before pregnancy test, it is recommended that the test within 7-10 days after the cessation of menstruation. It is recommended that the test be conducted within 7-10 days after the cessation of menstruation; 3. drinking water before the pregnancy test: the concentration of HCG value is low in women who are just pregnant, so if they drink a lot of water before the test, causing dilution of urine, it may affect the test results; 4. taking medication before the pregnancy test: taking hormonal drugs for the pregnancy test may affect the HCG concentration in the human body, resulting in inaccurate results; 5. the quality of the pregnancy test stick Problems: expired, damp and unqualified pregnancy test sticks can lead to inaccurate results, and it is recommended to buy pregnancy test sticks from regular pharmacies; 6. Other hormone interference: when hypothyroidism, high thyroid stimulating hormone leads to false positive results; high luteinizing hormone during ovulation leads to false positive results.