A pregnancy test one deep and one very light, may be pregnant, also does not rule out the test failure. 1. pregnancy: the observation window of the pregnancy test stick is divided into two areas, the upper line is the control line, the color is deep on behalf of the normal work of the pregnancy test stick; the lower line is the detection line, in the early stages of pregnancy, due to the low content of HCG (human chorionic gonadotropin) in the urine, which is reflected in the test paper, it will be manifested as a lighter color line. This situation represents pregnancy. 2. Failed test: If the color of the control line is very light and the color of the test line deepens, it may also be a sign of failed test. It may be related to the moisture of the pregnancy test stick, the pregnancy test stick is damaged, the pregnancy test stick is expired, the test method is not appropriate and so on. It is necessary to repurchase it and use the urine of the next morning to conduct the test. To summarize, it is recommended to read the instructions carefully before using the pregnancy test and to observe whether there is any breakage, and if necessary, retest or seek medical examination.