Can i take a test 9 day before my periods due and how accurate would it be or whats the earliest i can take a pregnancy test i have 2 children already?

Waste of time: The urine pregnancy test relies on hormones made by the developing embryo after implantation.Before implantation (days after conception), there is no hormones to test.In the early days after implantation, the level may be too low to turn the test positive.At the point you are late, there might be enough to test positive, but early on this can still be negative.