Clearblue pregnancy tests are available in both digital and standard form. The tests detect the presence of human chorionic gonadotropin, or hCG, in urine. Clearblue pregnancy test results are read in two different ways, depending upon the test.
The first step to reading an accurate result is to ensure that the test is taken properly. Holding the test strip's wick end in either a stream or cup of the first morning urine produced will measure the most accurate concentration of hCG.
A test is only valid during the time frame specified by the manufacturer. Clearblue test results are valid between two and 10 minutes of the test being taken.
A Clearblue digital test displays results on a digital readout. When the test is started, a small hourglass symbol will flash while the test is processing. At the end of the test, the results are displayed in the window in text--"pregnant" or "not pregnant."
This test has two windows that display lines. The larger round window is the test result and the smaller, diamond window is the control. When a blue plus sign appears in the test window, the result is positive.
Because a test is only valid for 10 minutes, reading the results at a different time may result in a false positive or an evaporation line. Any positive test should be confirmed by a blood test performed by a doctor.