Idea Gray is a color band that appears gray instead of a distinct red line when tested by an early pregnancy test paper and the test area shows a color band. The chances of pregnancy with the presence of Idea Gray need to be analyzed specifically. If the gray color appears on the pregnancy test 10-14 days after intercourse, the chances of pregnancy are relatively high. If the gray color appears on the pregnancy test more than 15 days after intercourse, the chances of pregnancy are relatively small. Women 10-14 days after intercourse using pregnancy test paper, found that the idea of gray, may be due to the early stage of conception, urine HCG concentration is low, and can not detect the red line but the idea of gray, the chances of pregnancy is greater at this time, you need to repeat the test in about three days or go to the hospital to draw blood to determine. If the test is done more than 15 days after intercourse, the chance of pregnancy is relatively small. Because more than 15 days after intercourse, the concentration of HCG in the urine is enough to make the early pregnancy test paper appear obvious discoloration, and then the idea of gray may be caused by improper use of the early pregnancy test paper or early pregnancy test paper failure, generally will not be the manifestation of pregnancy. During the preparation for pregnancy, if a woman detects a gray color, she can have a regular checkup or take a blood test for HCG to make a clear diagnosis.