There are many reasons that may cause a weakly positive early pregnancy test, mainly: first, the time of conception is relatively short and the HCG level in women’s bodies is relatively low at the time of testing, so a weakly positive early pregnancy test will appear, and a strong positive test will appear after a few days; second, the quality of the early pregnancy test may also lead to such a situation, such as the early pregnancy test is stored for too long or improperly stored, and moisture may cause the test to fail. Thirdly, the test paper may also be weakly positive after the third month of pregnancy, because the HCG level in the body will gradually decrease after the third month of pregnancy, which may show a weak positive result.