Early pregnancy test paper is a sensitive indicator of early pregnancy through the urine test HCG, probably the detection rate of about 90%, there is a certain false-negative situation. For the urine is relatively light, it is possible that the test results will be distorted, it is recommended that the patient for the first morning urine to check. The urine is concentrated overnight and contains higher levels of HCG, which is almost undetectable in the urine of a normal non-pregnant woman, so taking morning urine can significantly increase the positive detection rate of early pregnancy. Patients should minimize drinking water before going to sleep the night before. If you check the two red lines of the early pregnancy test paper, one of which is relatively light and less obvious, accompanied by a significant delay in menstruation, you can go to the hospital for a blood test to check the level of HCG in the blood, which is very effective and has a detection rate of close to 100 percent.