The situation of one deep and one light on the early pregnancy test paper is clinically common for the following reasons: First, the number of days of pregnancy is still relatively short, so the concentration of HCG in the urine is still relatively low, so there is a weak positive situation of one deep and one light, so it is recommended to check again every five days. It is recommended not to drink too much water before taking the urine specimen, resulting in dilution of the urine, which will also appear clinically as one deep and one shallow, and then do another test two hours before taking the urine. Third, it may be ectopic pregnancy, because the blood HCG concentration does not rise every other day in ectopic pregnancy, it is lower than normal pregnancy so it will appear weakly positive, it is recommended to monitor the blood HCG to give a diagnosis.