It is possible that a deep and shallow early pregnancy test is a biochemical pregnancy or an ectopic pregnancy. In addition, it is also possible that the HCG concentration in the urine is relatively low because of the short duration of pregnancy, so it appears one deep and one shallow. It is recommended to do another test at an interval of 3-5 days. You can use the morning urine to do the test and most of the time, the two lines will be the same color. If there is still one dark and one light line, a blood HCG test should be done at 1 day intervals to find out whether it is a biochemical pregnancy or an ectopic pregnancy. Once the results are known, ultrasound is necessary to determine the location of the gestational sac.