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.
A pregnancy test detects the hCG (Human Chorionic Gonadotropin) hormone in your urine. The presence of this hormone confirms your pregnancy status. Many times, an hCG test proves to be negative even if you are pregnant. This is because hCG enters the blood stream 8-10 days after fertilization (before a missed period).The detectable levels of hCG in urine occur only 1-2 weeks after missing your period.any times, an hCG test proves to be negative even if you are pregnant. This is because hCG enters the blood stream 8-10 days after fertilization (before a missed period). The detectable levels of hCG in urine occur only 1-2 weeks after missing your period.