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.
However, since hCG levels are near their peak at about 10 to 12 weeks LMP, hCG levels may still be high enough 2 weeks following an abortion that pregnancy testsâboth blood-based and urineâwill still be positive. Sensitive pregnancy tests, including commonly-used office or home use urine test kits are likely to be positive between 16 to 60 days.