The strength of the positive test line depends on how much hCG is in your urine. If the line is faint, it usually means that the hCG level is low. One reason why hCG levels may be low could be because you’re still very early into your pregnancy. Some very sensitive pregnancy test kits can detect pregnancy as early as 6 days before your missed period (5 days before you expect your period), however the levels of hCG this early are so low that you can expect any line to be faint. As your pregnancy progresses, the levels of hCG will rise, so if you choose to test again, you will likely see a much stronger positive line.
Why is the line so faint on my pregnancy test?