One deep bar and one particularly light bar on the early pregnancy test paper indicates a weakly positive test result, which may be pregnancy. For the accuracy of the result, you can go to the hospital for a professional blood HCG test. Early pregnancy test paper is used to diagnose whether you are pregnant by detecting the level of human chorionic gonadotropin (HCG) in human urine. The presence of two red bars suggests pregnancy, and if one is deep and one is particularly light, it may be caused by a short period of pregnancy. In addition, improper use of test paper, abnormal pregnancy and taking drugs can also lead to a deep and a particularly shallow early pregnancy test paper. 1. short pregnancy: in early pregnancy, the level of human chorionic gonadotropin in the body is not yet significantly elevated, premature testing may appear a deep and a particularly shallow weak positive results, it is recommended to use early pregnancy test paper after 2 weeks of sexual life, the test results are more accurate at this time. 2. test paper If the morning urine is not used, and there is a lot of water, resulting in the dilution of urine, which may lead to the situation that the early pregnancy test paper is one deep and one particularly shallow; 3. abnormal pregnancy: if the early pregnancy test paper is one deep and one particularly shallow, the probability is pregnancy, but in a few cases it may be caused by abnormal pregnancy, such as gravidity, ectopic pregnancy, biochemical pregnancy and so on. Therefore, it is recommended to wait 1-2 weeks to undergo ultrasound examination in hospital to clarify whether it is a normal intrauterine pregnancy; 4. taking drugs: patients taking luteinizing hormone, hormone-containing contraceptive drugs, prostaglandin-like drugs will have a weak positive test with the early pregnancy test, which is not caused by pregnancy but by exogenous drugs.