Adenosine Triphosphate. Adenosine triphosphate (ATP) is considered by biologists to be the energy currency of life. It is the high-energy molecule that stores the energy we need to do just about everything we do.denosine Triphosphate. Adenosine triphosphate (ATP) is considered by biologists to be the energy currency of life. It is the high-energy molecule that stores the energy we need to do just about everything we do.
1 Home tests are sometimes done too soon after the missed menstrual cycle to result in a positive test. It typically takes 10 days after a missed menstrual period before the presence of hCG can be detected by the urine test.  All urine hCG tests should be done on a first morning urine sample, if possible.
Both test for hCG levels; the only difference lies in that the former tests its levels within the blood stream while the later in the urine. A positive blood test will usually show a positive result 3 to 4 days after implantation, or roughly 9 to 10 days after ovulation.For a home urine test, however, a positive result will not be visible until a week after implantation or until you have a missed period.t went from a red color & 4 days to a brown & 2 1/2 days. 2 months ago same thing so I took a test it was negative. Then when I woke up next morning that same test showed a positive result. Last month my period was a week early brown in color & only 1 1/2 days long. Took another test same thing happened again.