How important is it to use the first morning urine for an at home pregnancy test and if you don't what is the chances of a false test?

The reason it's best to take a hpt with your first morning urine is because the hormone produced at this stage is still not very much and as the first urine is much more concentrated there will be more hormone in it than in the watery urine later in the dayand also wait until you missed your period to test or there won't be enough hormone. If you are still unsure then you should go to your doctor and take a blood test ----best of luck