Pregnancy test paper, deep and shallow. What's going on?

Pregnancy test paper a deep one shallow representative is suspicious positive, this situation by several possibilities, as follows: first, that the woman has been pregnant, but due to the short number of days pregnant, so just detected pregnancy. Second, there may be biochemical pregnancy, that is, although pregnant but embryo development is not good, has stopped developing. Therefore, in this case, it is recommended to go to the hospital as soon as possible to do a blood test, according to the blood value to determine whether the embryo development is good, or has stopped, the doctor can guide the next step according to the results of the examination.