Weak positivity usually refers to the use of pregnancy test paper with a dark and light situation, this situation may be caused by the number of days of pregnancy is too small, may also be ectopic pregnancy, biochemical pregnancy and other reasons. 1. too few days of pregnancy: if you use a pregnancy test paper when the embryo has just been laid, the hormone level in the body is still relatively low and cannot be measured clearly by the test paper, and you need to carry out a blood hCG measurement in order to make it clear whether or not the pregnancy has occurred. 2. Ectopic pregnancy: If ectopic pregnancy occurs, the development of the embryo is affected, the body’s hormone secretion will be less, thus showing a deep and light weak positive. 3. Biochemical pregnancy: If there is a strong positive pregnancy test and then a weak positive test, it means that the hormone level in the body has decreased, which is common in biochemical pregnancy. Therefore, if you find a weak positive in the pregnancy test paper, you need to go to the hospital in time to have a full examination to clarify the cause of the disease, and then take a reasonable approach to treatment.