A pregnancy test is deep and light but not pregnant, considering the false positive results, the quality of the pregnancy test, biochemical pregnancy, gynecological tumors and other factors can be caused. 1. The quality of the pregnancy test: including the quality of the manufacturer, the way of storage, as well as the time problem, whether it is expired or there is interference with the mixing factors, should be considered comprehensively. 2. Biochemical pregnancy: HCG value changes can be detected in the body after fertilization of the egg, but if the embryo does not continue to develop, then HCG is no longer secreted, resulting in a biochemical pregnancy, may not be pregnant but a pregnancy test stick with a deeper and a lighter performance. 3. Gynecological tumors: such as chorioamnion, choriocarcinoma, etc., will stimulate the body to produce HCG, there will also be no pregnancy pregnancy test a deep and light phenomenon. In addition, if you have recently had an abortion, and the embryonic tissue is not cleaned up, there will also be a pregnancy stick with a deep and light situation. If the pregnancy test is dark and light but not pregnant, it is recommended that the patient consult a doctor in time to clarify the cause of the disease and give targeted treatment.