A pregnancy test paper with one deep and one light and a little bleeding may be related to factors such as shorter duration of pregnancy, implantation bleeding, pre-eclampsia, ectopic pregnancy or biochemical pregnancy. The depth of the pregnancy test paper is related to the level of HCG in the body, if the concentration of HCG in the body is high, the pregnancy test paper will be the same depth in both channels, one deep and one light indicates that the concentration of HCG in the body is low, and the level of HCG concentration is related to the development of the embryo. At the beginning of pregnancy, the HCG secretion is less in about 8 days after ovulation, and there may be a small amount of bleeding at the time of implantation; however, if the test is weakly positive beyond the time when menstruation should come, and bleeding occurs, it is considered that the embryo is underdeveloped, and there may be a miscarriage with a prior sign, ectopic pregnancy, or a biochemical pregnancy. If the pregnancy test is dark and light and there is some bleeding, it is recommended to go to the hospital in time for examination, to clarify the cause of the disease and follow the doctor’s instructions to deal with the treatment.