Pregnancy test stick is affected by more factors, it is generally recommended that the patient is morning urine, that is, the first urination in the morning, because this concentration will ensure some, diluted state can not accurately reflect the state of pregnancy, and pregnancy with the HCG value continues to change, there will be some changes in the depth and shallowness. Different manufacturers produce different brands, the performance of each is not the same, if it is really a deep and shallow, it is recommended to retest 1-2 times, the most accurate is to go to the hospital to draw blood to test HCG, the doctor will help you clearly determine whether it is a pregnancy. Content source: Dr. You Lai