Ok here goes, I took a digital clear blue test, it was evening and im about 2 weeks late and the urine was very weak. It shows "not pregnant" in the window.
Earlier on before I did the test I read this on the "official tech guide for the test":
How the test works
Unlike the traditional Clearblue Pregnancy test, the new Clearblue Digital Pregnancy Test with
Conception Indicator contains two test strips – a low sensitivity strip and a high sensitivity strip.
Inside a Clearblue Digital Pregnancy Test
with Conception Indicator
Urine travels up the Absorbent Sampler and flows through the pad. If hCG is present in the urine it
will bind to anti-αhCG antibodies attached to blue dye in the pad. The urine moves along both test
strips. As the hCG and anti-αhCG antibodies pass through the result line zone, they bind to anti-
βhCG antibodies to form blue result lines.
Both strips contain a ‘result’ line; the low sensitivity strip also contains a ‘control’ line. The Test
monitors the control line on the low sensitivity strip and only when a valid control line has been
detected will the result lines on both the strips be determined.
At low concentrations, hCG binds on the high sensitivity strip. At higher concentrations, hCG will also
bind to the low sensitivity strip. The concentration of hCG detected in the results lines of the two
strips determines the result of the Conception Indicator: 1-2 weeks since conception; 2-3 weeks since
conception; 3+ weeks since conception. If no hCG is present, the anti-αhCG antibodies attached to
blue dye flow past the result zones on both strips, and no lines will be formed giving a ‘Not
Pregnant’ result. If insufficient hCG is present, result lines may form but will be below the lowest
thresholds set, and a ‘Not Pregnant’ result will be displayed.
The lines produced on the strips cannot be read by eye. Instead, an optical system is used to
measure the density of the lines. A red light shines onto these specific areas, and the light reflected
is converted into an electrical signal.
Now I took the test apart as soon as the test results were shown, now if I read it right there should only be ONE control line present on the strips if NO hcg was present. Is this right.?
This file shows what was on the strips.
What do you think.?
test.JPG (7 Kb, 9 downloads) Strips
test.JPG
