When you become pregnant, your body produces the pregnancy hormone, human Chorionic Gonadotrophin (hCG). The amount of hCG in your body doubles approximately every 2 - 3 days, and reaches a maximum at around 7 - 12 weeks into the pregnancy. It stays at a higher than normal level for the rest of the pregnancy, and for up to 3 weeks after giving birth. The level of hCG can be elevated above normal levels for up to 9 weeks if you have had a miscarriage or a termination. Click here to see an explanation of how the level of hCG changes in pregnancy.
The Clearblue DIGITAL Pregnancy Test with Weeks Indicator works by detecting the pregnancy hormone in your urine and is over 99% accurate when used from the day your period is due. You can use it up to 4 days before your period is due but if you get a ’Not Pregnant’ result, you should test again when your period is due. The levels of pregnancy hormone in your urine may not be high enough to be detected yet.
An optical reader inside the test stick interprets the result for you and shows this on a digital display: ’Pregnant’ or ’Not Pregnant’. If the result is ’Pregnant’ the Smart Dual SensorTM also monitors the concentration of the pregnancy hormone, and provides an estimate of how many weeks ago you conceived: 1-2, 2-3 or 3+. This is displayed together with the ’Pregnant’ result.
The Clearblue DIGITAL Pregnancy Test with Weeks Indicator is quick and easy to use, and produces a result in just 3 minutes.